Favorite videos on YouTube

1/ You need to log in with your account

2/ In grey under the video, there's "add to", yes it is a link, it's not very intuitive, but you have to click on it, and then a little color change appears, I guess it's to indicate that a tab is opening, but I still don't get it ;-)

3/ And there again, we don’t know what to do... but yes, the word "favorite" in the list below, it's another link!! even though it looks more like a summary list of the number of favorite videos, etc. you have to click on it