Open YouTube
Find the video you want to loop
Click the video to start playback
Right-click the video (or press and hold on mobile)
Select “Loop” (if available)
If “Loop” isn’t available, open the video in a browser
Use a loop extension (e.g., “YouTube loop”) and enable it
Or use a third-party site/player that supports looping
Or copy the video URL into a looping-capable player you trust
For a playlist loop: open the video’s playlist (or create one)
Click “Play all”
Enable repeat on the playlist player (repeat icon)