Tells YouTube that your browser only supports videos at 30FPS or less, which switches all 60FPS videos to 30FPS and allows old computers to watch high-resolution videos without stutter!
< Feedback on Disable YouTube 60 FPS (Force 30 FPS)
This is because YouTube doesn't host 30 fps videos in higher than 720p. The only way to do something like this in higher quality would be to download the video, re-encode it to 30 fps, and stream it back to you. But that'd take too long
Something seems broken. On this video (and all the other ones), when a video has 60fps option, it limits to 720p. Nothing higher.
With script enabled:
Without script: