Cross-platform reposting is how one clip becomes 3-5x the discovery surface area. The base workflow: edit once, export at 1080x1920, post to TikTok first, then YouTube Shorts, then Instagram Reels.

The order matters. TikTok algorithms favor original content posted first to TikTok. YouTube Shorts and Instagram Reels are more lenient about cross-posted content. Posting TikTok-first and then to the other platforms with a 30-60 minute delay gives TikTok the original-content boost while still feeding the other platforms.

Per-platform tweaks:

• TikTok. 21-34 second clips perform best. Add 1-3 platform-specific hashtags.
• YouTube Shorts. Allow up to 60 seconds. Add a question in the first frame to trigger comment engagement.
• Instagram Reels. Aspect ratio matters more — keep faces and text in the center 9:16 frame. Music selection from Instagram's library boosts reach.

The repost discipline: same clip, three platforms, three slightly different captions. The 5-minute extra effort doubles the daily reach.