Shorts
Vertical videos up to 60 seconds, launched in 2020 as YouTube's TikTok rival and served in a dedicated feed.
Shorts run on a separate algorithm from long-form. SumTube does not summarize Shorts in MVP — a ≤ 60s video derives little value from a summary and can't host meaningful chapters. Phase 2 ships a "30 Shorts at a glance" surface instead.