In this case, it looks like they've discovered that the community isn't asleep at the wheel and that this isn't the hill they want to die on.
"The chief penalty [of good people who refuse to lead] is to be governed by someone worse." -- Plato
edit I think YouTube-Red's successor has DRM on it's videos, I don't think youtube-dl ever worked on them though.
If all videos used the same system then youtube-dl would not have had any reason to make major label music videos part of their unit tests.
That sounds like they didn't really have any reason to make major label music videos part of the tests, it was just a developers personal preference. Though, it doesn't prove this is the case.
The removed "Test generic use_cipher_signature video (#897)" case did make use of ID UxxajLWwzqY.
And next time youtube makes one of their frequent changes to their website the extractor will break in some way. Somebody will work to fix it and make use of the same tests, only now some of them won't be in the public codebase.
And now they are pretending "What is this youtube-dl thing everybody is talking about recently?"
RIAA, you are heroes. That's very nice to promote underfunded free software projects like this.
We had mass demonstrations across Europe with the Article 13 fiasco and nothing happened.
Revolutions aside, copyright will never be reformed anywhere in a consumer friendly manner - politicians are way too deep in the pockets of the industry.