In addition to the unhook addon that others also recommended and is great, I would also suggest, as an alternative, setting a redirection rule from "www.youtube.com/shorts/XYWZ" to "www.youtube.com/watch?v=XYWZ". This will play the short but in the classical youtube video (landscape) format, with no infinite scrolling, or replay or autoplay (assuming these are in general disabled), which takes away a big part of the addictive aspect of shorts.