@TeamYouTube I am having trouble adding one of the videos to the favorites app on the youtube mobile app. When I press save and I wanted to save it to my favorites it tells that I have an unknown error. I don't know why it has an error of unable to add videos to my favorites list
Thanks for the info, reinstalling the app usually does the trick – slow internet could be a factor too. If that doesn't work, you can send a report through the official Send Feedback tool: https://yt.be/help/feedback