I made our wedding playlist on YouTube, since I pay for premium, and about 30% is now gone after a couple years. It would be nice if YT at least gave some indic

I made our wedding playlist on YouTube, since I pay for premium, and about 30% is now gone after a couple years. It would be nice if YT at least gave some indication of things they do not plan to delete, i.e. it's an official source not an upload subject to the whims of DMCA.