Not quite what you asked for, but this is the bookmarklet I use: javascript:(() => { let v = window.location.href.split("/"); window.location = "https://www.

Not quite what you asked for, but this is the bookmarklet I use: javascript:(() => { let v = window.location.href.split("/"); window.location = "https://www.youtube.com/watch?v=" + v[v.length - 1]; })();