You CANNOT always delete videos from a YouTube playlist of yours

Sometimes the message "Unavailable videos will be hidden during playback" appears in the page where you edit a CZcams playlist of yours and you're not allowed to fix that yet simply delete them!
Hat the Jazz by Twin Musicom is licensed under a Creative Commons Attribution 4.0 license. creativecommons.org/licenses/...
Source: www.twinmusicom.org/song/289/h...
Artist: www.twinmusicom.org

[@Raza-0007]

I resolved this issue by adding all the songs in that particular playlist one-by-one to a new playlist, and then I deleted the old playlist. Thankfully I only had 59 songs in there so the process only took 20 minutes.

[@GianniLupindo]

There is a specific method to add all the videos at once but this method is good only if you don't mean to loose all the acquired views. In any case if you resolve it's because new playlists got another code compared to the old ones in which this hasn't fixed yet.

[@Raza-0007]

@@GianniLupindo There is a method of moving all the videos to a new playlist at once, but that method also moves the invisible unavailable videos as well. Moving one-by-one resolves the issue. And yes you are right, this will erase the view count, but luckily my video songs list was private, so it did not matter to me.
It is obviously a bug in the CZcams system, one should be able to remove just the unavailable videos, but until they fix it, this is the only way.