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Stop videos from auto playing
THIS SCRIPT IS OBSOLETE - YouTube have updated the former persistent auto-play button
Please check out more of my more sophisticated tools too, especially this: https://gfork.dahi.icu/scripts/4081-custom-youtube-video-tools
YouTube Stop AUTOPLAY
This script will simply stop video auto playing onto the next video in the playlist.
How it works
It looks for a className that is only present when the button is active; or on, and clicks the element with that className if it is existent.
Try increasing the delay amount, if it fails to stop the autoplay.