Most short-form creators post one video to three feeds — TikTok, Instagram Reels and YouTube Shorts — and get three wildly different results. That is not randomness; each feed is optimising for its platform's larger goal.
What each feed wants
- TikTok is the pure discovery engine — most likely to take an unknown creator viral, most volatile week to week (mechanics in the algorithmic feed explainer).
- Reels feeds Instagram's identity machine — distribution leans toward converting viewers into profile visits and follows.
- Shorts serves YouTube's library strategy — its superpower is funneling viewers toward long-form and subscriptions (see Shorts vs long-form metrics).
Reading the same video three ways
Compare each upload against that platform's own baseline, never across platforms — view counting itself differs (a TikTok play counts instantly; see how TikTok counts views). The interesting signal is divergence: a video that Shorts loves and TikTok ignores tells you it rewards context and patience; the reverse says it lives on instant hook.
The distribution play
Film once, post native captions and covers per platform, and let 90 days of results tell you where your format compounds. Track the follower/subscriber response on the platform counters.