Youloop — Youtube Video L

Loop any part of a YouTube video. Set A and B points on the timeline, hit toggle, and it loops. No fluff, no tracking — just works.

I built this because I was learning guitar on YouTube and got tired of dragging the seek bar back to replay the same 30-second riff over and over.

You pick a start (A) and end (B) — either by clicking buttons while the video plays, or by dragging two markers on the progress bar. The region between them lights up red. When playback hits B, it jumps back to A in the same frame. Frame-accurate, no stutter.

Loop points are saved per video and restored when you come back. Everything stays on your device. No servers, no analytics, no accounts.

Works on regular YouTube pages, embeds, theater mode, fullscreen. Doesn't work on Shorts — they're already loops, and the UI wouldn't fit anyway.

If an ad plays, the loop pauses until the content returns. Very short loops (<1s) might hitch on the first cycle due to buffering, then smooth out.

Source is at github.com/quanggpham/youloop.