Deep dive
Pick a niche the big apps underserve
Competing head-on with a general entertainment feed is not a realistic plan for a new product. What works is depth: a feed for one sport, a regional language, cooking, education, local news or a professional community where general apps show too much noise. A niche also keeps moderation, music rights and creator recruitment manageable.
Seed supply before launch. A short-video app with no videos is a blank screen, so recruit a few dozen creators, give them early tools and a reason to post, and pre-load the feed with their best work. Our MVP development process keeps the first release small enough to change direction after the creator beta.
How the upload and playback pipeline works
The app records and compresses video on the phone, then uploads it in chunks directly to object storage so a dropped connection does not restart the upload. Workers transcode it into a ladder of resolutions and bitrates, extract a thumbnail, run moderation and publish it to the feed. Viewers stream it with adaptive bitrate playback from a CDN, so the first frame appears quickly even on slow networks.
The feed player is where users feel quality. Preload the next one or two videos, start playback the moment a video is mostly visible, release memory for videos that scroll away and measure time to first frame on real devices. These details matter more to retention than any visual polish.
- Upload straight to storage with signed URLs; never stream video through your API servers.
- Keep H.264 renditions for older devices and add HEVC or AV1 where hardware decoding is available.
- Log startup time, rebuffering and watch time per video from the first release.
How a For You feed decides what to show
A recommendation system for short video usually works in stages. Candidate generation pulls a few hundred videos from sources such as followed creators, trending content, similar videos and fresh uploads. A ranking model scores them on predicted engagement such as completion, rewatch, likes and shares, and a final pass adds diversity, removes repeats and enforces policy.
For an MVP, a hand-tuned score from watch time, engagement and freshness is enough, provided every new video gets some exposure so creators are rewarded. As data grows, embeddings for videos and users and a learned ranking model take over. The important early decision is logging: impressions, skips and watch time must be recorded accurately, or there is nothing to train on later.
Moderation, safety and regulation
App store rules require user-generated content apps to filter objectionable material, let users report and block, and act on reports. On top of that, the EU Digital Services Act, the UK Online Safety Act and India's IT Rules set notice-and-action duties; India's 2026 amendment also requires clear labels on AI-generated or altered media and much faster takedowns when content is flagged by a court or the government.
Design for audit trails, fast takedowns and appeals from day one. Combine hash matching for known illegal material, classifiers for nudity, violence and spam, and human review for edge cases. Protections for teenagers, such as private-by-default accounts and limits on messaging from strangers, are expected in most markets and required in several. Take legal advice for each launch country.
What it costs to run and scale
Video platforms have heavier running costs than most apps. CDN bandwidth, transcoding, storage, moderation API calls and the analytics store all grow with usage, so model cost per thousand views before launch. Annual maintenance for the apps and backend is roughly 15-20% of the build cost, on top of those usage fees.
Live streaming, ads and creator payouts are each substantial products of their own, which is why they sit in the scale tier. Fund them when retention and creator activity show the core loop works. Our AWS and cloud cost optimization teams usually review the media bill once traffic is real.