@tilvids Not sure what "third-party" apps they're talking about because they mention API use and the only 3rd party apps I use don't make use of youtube's API... Piped: Unaffected, YTDLP: Unaffected, NewPipe: Unaffected, SmartTube: unaffected.
The only app i've noticed any recent change on was revanced, which is not a third party app, its a mod of their official first party app and the fix was just to patch a newer youtube version.