You should use the full video URL, It looks something like this:
https://www.youtube.com/watch?v=ABCDEFGH
In the above example, ABCDEFGH is your video ID, Sometimes, your URL may contain extra arguments in front of the ID for example:
https://www.youtube.com/watch?v=ABCDEFGH&ab_channel=Test&t=3
In this case, you should delete these extra options and just provide the full URL (Like the first example)
Do not use URLs starting with youtu.be, otherwise the bot might not function correctly.
Full guide: Step 1: Goal & Tasks (view target) on docs.dalga.dev