Is this actually happening? Because it makes little sense when you consider that YouTube-parent Google is sponsoring security education videos. See this GCP-sponsored LiveOverflow video:
https://www.youtube.com/watch?v=E-P9USG6kLs
Maybe Google's killing off dodgy script kiddie vids, and leaving quality content up (and I mean the rest of LiverOverflow's videos et al, not just the paid-for stuff.)