Greasy Fork is available in English.
When you are adding videos to your playlists Sometimes you don't remember if you've already added that video. This script puts an H button next to the search bar to Hide videos you've already added to your playlists, so there are no duplicate videos in your playlists.
< Feedback on Hide videos that are in playlist
I'm too busy to make a video but if you tell me which part you don't understand exactly, it would be easier for me to explain. The idea of the script is to hide the videos that are already in your playlist so you won't add the same video to the list several times.
Can you teach it how to use it in a video?