I have already encountered a video that the latest version of youtube-dl fails on.
Re:New youtube-dl release: v2020.11.01.1
by boomboomsubban on Sunday November 01, 2020 @11:01AM
(#24960320)
It has never been perfect, there have always been some uploaders where some of there very long videos would fail for me. I suspect if I toyed with the formats requested it would work, but generally just don't try.
Not sure what RIAA's endgame is though. I'm somewhat fearing that they are coordinating with Youtube in an attempt to prevent any organised effort against youtube's next obfuscation or something.