I've been looking for such an extension for a VERY long time! It does what it says but it could save us the trouble with playlists even further, if you can make it automatically trim that playlist BS from the URL upon copying the video URL. Meaning, when you right click on a video in the search results and select "Copy URL", the extension to automatically remove the playlist part and when you paste the URL wherever (even outside the browser), the pasted URL will be trimmed. That means the extension will need to access clipboard but I think that's doable (on Linux at least, IDK about Windows).