What is a microlearning video?

A microlearning video is a single-idea lesson, typically 30 seconds to 7 minutes, designed to be watched once in the flow of work rather than as part of a scheduled course. The format assumes a phone, a short attention window and no enrolment step.

Do microlearning videos need captions by law?

In most regulated contexts, yes. WCAG 2.1 success criterion 1.2.2 requires captions on prerecorded video at Level A, and 1.2.4 requires them on live video at Level AA. The US DOJ Title II rule requires WCAG 2.1 AA for public entities, with deadlines extended in April 2026 to 26 April 2027 for larger entities and 26 April 2028 for smaller ones. The European Accessibility Act has applied since 28 June 2025, with a transition to 2030 for pre-existing content but not for audiovisual media services.

Are captions and transcripts the same thing?

No, and an accessibility buyer will not accept one for the other. Captions are time-synchronised text shown with the video, including speaker identification and meaningful non-speech sound. A transcript is a separate text document. Audio description is a third deliverable again, a narration track describing visual information, required by WCAG 1.2.5 at Level AA.

Does FastPix support SCORM or xAPI?

No. There is no SCORM packaging, no xAPI and no learning record store. Completion and playback events arrive as signed webhooks that your application writes into its own records. If your buyer requires a SCORM package for an existing LMS gradebook, that layer belongs in your product or a partner.

Which LMS platforms does FastPix integrate with?

Moodle is the one named, tested integration, shipped as four plugins. Canvas, Open edX, Blackboard and Brightspace are not supported integrations; they can receive FastPix webhooks the same way any system with an HTTP endpoint can, which is a different thing from a plugin.

How do I track completion per learner?

The player emits start, milestone and completion events per session. Tag each lesson with your own identifiers at upload, receive the events on a signed webhook, and write them against the learner in your database. FastPix stores your metadata and returns it on every read but does not index it for querying.

Can learners watch lessons offline?

Yes. An MP4 rendition can be enabled per lesson for download, which matters for field and frontline workers on factory floors, in warehouses or in transit where there is no reliable connection.

How many languages do auto-captions cover?

22 languages, 6 fully supported and 16 in beta, generated in the language spoken in the video at $0.048 per minute. FastPix does not translate, so a lesson recorded in Spanish produces Spanish captions. For other languages, upload your own caption file per market.

What does a library of 2,000 short lessons cost?

Two thousand lessons at seventy seconds is about 39 hours of video, billed per minute across encoded, delivered and stored minutes with no per-title and no per-learner fee. Short-lesson libraries are exactly where per-minute and per-title pricing diverge most. See pricing.

How is microlearning different from an online course platform?

A course platform assumes enrolment, a cohort, long lectures and a gradebook. Microlearning assumes none of those: a lesson is a minute long, watched on demand at the moment of need, and success is measured by completion rather than by a grade. The video requirements diverge accordingly, toward asset count, mobile playback and captions rather than DRM and long-form encoding.

FastPix for microlearning

Video API for microlearning apps

FastPix Video API has everything you need to run a microlearning app. Fast uploads, a vertical player with instant next lesson, captions on everything, and completion data per learner.

Start building Get a demo

Per-minute pricing, no per-learner fee and no per-title fee. $25 in signup credits, no credit card.

Auto-captions22 languagesOfflineMP4 per lessonCompletionper lesson, per learner

Trusted by teams shipping video at scale

Why FastPix

Complete video infrastructure for microlearning platforms

One API, whole stack

Upload, encoding, playback, captions, AI and data all come from the same API key.

Fast by default

Per-title encoding and prefetch mean the next video starts before anyone notices it loaded.

Built for scale

Thousands of small assets cost what they use, because there is no per-title fee.

Analytics built in

Every session reports watch time and playback quality, with no separate analytics product to buy.

Developer reference

Video API reference for a microlearning platform

Everything on this page maps to a documented call, grouped the way a lesson travels from upload to a completion record.

Publish a lesson

Upload media from device Create media from URL Set up resumable uploads Add metadata to videos Create and manage playlists Normalize audio loudness Webhook: media events Video on demand guide

Encode and deliver

Configure media quality levels Speed up video processing Play your videos Create a playback ID Enable MP4 for offline viewing Get media input info Webhook: transform events Encoding guide

Player and feed

Player SDKs overview Build a shorts feed with React Control playback speed Set the playback start point Configure preload and CORS Add chapters to the timeline Webhook: player events Player SDK guide

Captions and tracks

Generate subtitles automatically Add subtitles to a video Upload and play tracks Add audio to a video Manage audio and subtitles Add tracks from the dashboard Webhook: event reference Caption guide

Access and AI

Generate JWTs for secure media Restrict playback access Set up DRM encryption Generate an attributed transcript Generate video chapters Generate an advanced summary Webhook: in-video AI events In-video AI guide

Lesson data

Video Data overview List video views Find out why viewers drop off Use custom dimensions Quality of experience metrics Build workflows with the API Webhook: exception alerts Video Data guide

Customer story

Having more of the infrastructure and features we needed, including the in-built deep analytics and web and mobile player, in one place, as opposed to say AWS or Kaltura, reduced the complexity for us.

Prabhakar P

Head of Digital, Knovo

Read the Knovo story

Lesson library

Video hosting for a library of short lessons

FastPix takes lessons in any format your team records and processes each one automatically. Every upload comes back encoded for every network, with the audio levelled and a playback ID ready to embed.

URL pull or direct upload per lesson, with a webhook when each one is ready. Guide
Per-title encoding and HLS delivery from 300 locations, so a lesson starts fast on 4G. Guide
Audio levelled on upload, so a lesson recorded on a laptop matches one from a studio. Guide
A pathway is a playlist, so lessons stay ordered and reorderable through the API. Guide

Explore building a microlearning app

Video player

Video player SDKs for a lesson feed or a course page

The FastPix player runs both shapes microlearning takes, a vertical swipe feed or a lesson inside a course page. One playback ID drives both, so switching layout is not a re-integration.

In a feed, 9:16

The vertical swipe feed, native rather than a landscape player turned sideways.

Native 9:16 playback, not a landscape player rotated sideways. Guide
Next lesson prefetched while the current one plays, so a swipe lands on a frame.
Captions rendered over vertical video, for the way most of it gets watched on mute.

In a course page, 16:9

The same playback ID embedded on your page or an LMS one.

Embed by iframe, React component or native view, on your page or an LMS one. Guide
Chapters and playback speed the learner controls.
A start point your app sets, so a learner resumes where they stopped.

Offline and on any device

Download for no-signal viewing, across five native SDKs.

MP4 renditions per lesson, downloadable for anywhere with no connection. Guide
Five native SDKs across web, iOS, Android, Flutter and React Native.
Adaptive bitrate that steps down instead of stalling when the signal drops.

One playback ID drives both layouts, so switching shape is not a re-integration.

Explore the Video Player

Content security

Signed playback URLs and DRM for paid lessons

FastPix gates every lesson behind a signed URL your app mints after checking the learner. A copied link stops working when the token expires, and DRM sits on top when a publisher asks.

Signed playback on an RSA key pair, short-lived by default and minted per learner. Guide
Studio DRM where the content demands it, Widevine, FairPlay and PlayReady on top of the signed link. Guide
Domain restriction and browser rules, so a lesson plays inside your product and nowhere else. Guide
Downloads on or off per lesson, since an MP4 rendition only exists if you enable it. Guide

Explore building a microlearning app

Accessibility

Captions and WCAG accessibility for training video

FastPix generates captions on every lesson during processing, in the language spoken. Upload your own file where an audit needs a human pass, and add tracks to lessons that are already published.

Auto-generated captions in 22 languages, 6 fully supported and 16 in beta. Guide
Upload your own caption files when a human pass is required, which for compliance it usually is. Guide
WebVTT and SRT tracks, one per language, with no documented limit on how many an asset carries. Guide
Add captions after publish, so retrofitting an existing library does not mean re-encoding it.

Explore building a microlearning app

Video data

Completion tracking and video analytics for microlearning

FastPix Video Data reports what every learner did with every lesson. Start, milestones and finish arrive on a webhook, alongside watch time, replays and whether playback quality got in the way.

Learner progress

What one learner did, which is what a progress-aware feed reads to choose the next lesson.

Completion per lesson per learner, so a pathway knows what is done and what comes next. Guide
Where they stopped, which on a seventy second lesson points at one specific sentence.
Replays of the same lesson, the signal that something was not clear the first time.

Lesson performance

How a lesson performs across everyone, which is the decision behind the next revision.

Completion rate per lesson, read across the whole library rather than one cohort. Guide
The drop-off curve, marking the point where a lesson loses the room.
Ten custom dimensions, so course, department and role become filters rather than guesses.

Playback quality

Whether the app got in the way, kept separate from whether the lesson was any good.

Startup time and rebuffering, because a stall in a seventy second lesson is most of it. Guide
Playback failures by device, so a locked-down work laptop surfaces before the ticket does.
Network and region breakdowns, so a low completion rate is not really bad wifi.

56 dimensions on every session, first 100,000 session plays a month included, and every view available through the API for your own warehouse or BI tool. FastPix reports playback, not assessment, so quiz scores and LMS state stay on your side and the two get joined there.

Explore Video Data Build workflows with the API

API and SDKs

Video API and SDKs for a learning product

Every step above is one documented call on the FastPix API. SDKs cover seven server languages and five client platforms, and a webhook fires whenever a step finishes.

SERVER SDKS

Node Python Java Go Ruby PHP .NET

CLIENT SDKS

iOS Android Flutter React Native Web Player

Read the API reference

the whole integration

POST/v1/on-demandPublish a lesson

POSTsubtitles: trueCaptions on ingest

POST/tracksUpload a reviewed caption file

POST/playlistsOrder a pathway

POSTmp4SupportOffline rendition

GETVideo Data APICompletion per lesson

HOOKvideo.asset.readyLesson is live

HOOKsubtitle.generated.readyCaptions attached

AI agents

AI agents that cut recordings into lessons

The FastPix Clipping Agent turns a long recording into lessons without anyone scrubbing a timeline. It scores the moments and cuts them, and each clip comes back as its own asset.

Clipping Agent

Scores moments inside a long recording and cuts them, so a recorded workshop, webinar or all-hands comes back as lesson-sized clips instead of a timeline someone has to scrub. Each cut is its own asset with its own playback ID and its own completion data.

See the Clipping Agent

Search Agent

Ask for the lesson about a topic in plain language and get cited timestamps back, matched on transcript, frame and chapter. Useful when a library passes a couple of thousand lessons and the metadata on each one is no longer enough to find anything.

See the Search Agent

Explore AI video clipping

Integrations

LMS and completion integrations for microlearning

Lessons usually sit inside a course your LMS already runs. FastPix reports completion in the format that LMS reads, so the video layer never becomes a second system to reconcile.

Moodle

Four plugins covering upload, embedding, activity and the editor, with watch-based completion and gradebook writeback.

Guide

SCORM, xAPI and LTI

Completion reaches your LMS in the format it already reads, so a lesson counts inside the course rather than beside it. Documentation is pending.

Signed playback

Your app checks who the learner is, then mints a short-lived token so a paid pathway only opens for them.

Guide

Webhooks and warehouse

Every media, AI and playback event arrives as a webhook or an API call, so learning analytics stay in one place.

Guide

Benchmarked against five video APIs

Cold start on a short lesson, measured against five video APIs

A learner opens a dozen lessons in a session, so the wait happens a dozen times. A short 1080p clip was pushed through five platforms on the same file, region and network.

Cold time to first framenothing cached, lower is better

FastPix1.29s

Cloudinary1.60s

api.video1.74s

Gumlet posted 1.12s but completed only a few runs, so it is not treated as comparable. Across twelve lessons the gap between 1.29s and 1.74s is five seconds of a learner waiting.

Delivery consistencythroughput variation, lower is better

FastPix24%

api.video32%

Cloudinary103%

Uneven delivery is what stalls a video halfway through. At 103% the speed was swinging wider than its own average from one moment to the next.

Where we lose: api.video publishes a short clip 4.6 seconds sooner, at 23.6s against 28.2s, a wait your team has once per upload. Per-title encoding also produced 35% smaller files at matched quality, which is where a library of two thousand lessons saves money.

How it comes together

What it takes to build a microlearning app

Five steps between a recorded session and a learner finishing a lesson you can report on.

Get the lesson in

Upload from a device or pull by URL, and let the audio level itself on the way through.

Guide

Tag it to the pathway

Write course, topic and difficulty into custom fields, then order the lessons as a playlist.

Guide

Caption it

Captions generate during processing and a webhook fires when the track attaches to the lesson.

Guide

Put it in the feed

The player prefetches the next lesson while the current one plays, so a swipe lands on a frame.

Guide

Report completion

Player events fire per learner and per lesson, into your LMS or your own warehouse.

Guide

Keep reading

Go deeper on video for microlearning

Build guides, cost and engagement, for teams shipping short lessons on a phone.

How to build a TikTok-style microlearning app

The feed, the player and the pipeline behind short lessons.

Blog

What a microlearning app costs to build

Where the money goes across encoding, delivery and storage.

Blog

Best video APIs for microlearning platforms

How the options compare for thousands of small lessons.

Blog

Seven analytics metrics that matter

Which numbers actually tell you a lesson worked.

Blog

Building a recommendation feed

Serving the next lesson from progress and watch data.

Blog

Microlearning versus e-learning

Six differences that change how you build the video layer.

Blog

Send us ten lessons and an accessibility requirement

Bring ten real lessons and the standard your buyer audits against. In 30 minutes we will publish them, generate captions, enable an offline rendition and show completion arriving on a webhook.

· 30 minutes· Ten lessons· Captioned before you leave

Talk to us

Prefer to build it yourself? Start building

Common questions

Microlearning video questions, answered.

What is a microlearning video?
A microlearning video is a single-idea lesson, typically 30 seconds to 7 minutes, designed to be watched once in the flow of work rather than as part of a scheduled course. The format assumes a phone, a short attention window and no enrolment step.
Do microlearning videos need captions by law?
In most regulated contexts, yes. WCAG 2.1 success criterion 1.2.2 requires captions on prerecorded video at Level A, and 1.2.4 requires them on live video at Level AA. The US DOJ Title II rule requires WCAG 2.1 AA for public entities, with deadlines extended in April 2026 to 26 April 2027 for larger entities and 26 April 2028 for smaller ones. The European Accessibility Act has applied since 28 June 2025, with a transition to 2030 for pre-existing content but not for audiovisual media services.
Are captions and transcripts the same thing?
No, and an accessibility buyer will not accept one for the other. Captions are time-synchronised text shown with the video, including speaker identification and meaningful non-speech sound. A transcript is a separate text document. Audio description is a third deliverable again, a narration track describing visual information, required by WCAG 1.2.5 at Level AA.
Does FastPix support SCORM or xAPI?
No. There is no SCORM packaging, no xAPI and no learning record store. Completion and playback events arrive as signed webhooks that your application writes into its own records. If your buyer requires a SCORM package for an existing LMS gradebook, that layer belongs in your product or a partner.
Which LMS platforms does FastPix integrate with?
Moodle is the one named, tested integration, shipped as four plugins. Canvas, Open edX, Blackboard and Brightspace are not supported integrations; they can receive FastPix webhooks the same way any system with an HTTP endpoint can, which is a different thing from a plugin.
How do I track completion per learner?
The player emits start, milestone and completion events per session. Tag each lesson with your own identifiers at upload, receive the events on a signed webhook, and write them against the learner in your database. FastPix stores your metadata and returns it on every read but does not index it for querying.
Can learners watch lessons offline?
Yes. An MP4 rendition can be enabled per lesson for download, which matters for field and frontline workers on factory floors, in warehouses or in transit where there is no reliable connection.
How many languages do auto-captions cover?
22 languages, 6 fully supported and 16 in beta, generated in the language spoken in the video at $0.048 per minute. FastPix does not translate, so a lesson recorded in Spanish produces Spanish captions. For other languages, upload your own caption file per market.
What does a library of 2,000 short lessons cost?
Two thousand lessons at seventy seconds is about 39 hours of video, billed per minute across encoded, delivered and stored minutes with no per-title and no per-learner fee. Short-lesson libraries are exactly where per-minute and per-title pricing diverge most. See pricing.
How is microlearning different from an online course platform?
A course platform assumes enrolment, a cohort, long lectures and a gradebook. Microlearning assumes none of those: a lesson is a minute long, watched on demand at the moment of need, and success is measured by completion rather than by a grade. The video requirements diverge accordingly, toward asset count, mobile playback and captions rather than DRM and long-form encoding.

Pricing

Rate card

Per minute, with the player and analytics already in it. No per-learner fee and no per-title fee. See full pricing.

ENCODING

Pay per minute encoded

$0.0267/min 1080p Pro

Per-title ABR encoding across H.264.

Up to 720p Pro$0.0213 / min

Up to 1080p Pro$0.0267 / min

1440p (2k) Pro$0.0427 / min

2160p (4k) Pro$0.0855 / min

STREAMING

Pay per minute streamed

$0.00067/min 1080p Pro

Multi-CDN delivery from 300+ POPs.

Up to 720p Pro$0.00054 / min

Up to 1080p Pro$0.00067 / min

1440p (2k) Pro$0.00108 / min

2160p (4k) Pro$0.00217 / min

STORAGE

Pay per minute stored

$0.00268/min 1080p Pro

Assets stored and CDN caching, lifecycle handled.

Up to 720p Pro$0.00215 / min

Up to 1080p Pro$0.00268 / min

1440p (2k) Pro$0.00430 / min

2160p (4k) Pro$0.00860 / min

See full pricing Why FastPix →

Support

Three ways to get unstuck

Engineering

Engineering support

Stuck on an API call, a webhook signature or a player integration? Reach the engineering team directly, and hear back in hours rather than days.

Contact engineering

Docs

Integration help

Quickstart guides, SDK examples and playback logs in your dashboard, for the integrations most teams hit first.

Browse the docs

Community

Solution architect

A new build, a migration off another platform or a complex multi-tenant rollout. Plan it with a FastPix solution architect.

Join the Slack community