Does the fact that the RIAA is packed with stodgy, old corporate lawyers who most likely lack even superficial understanding of the term "version control" lack appropriate explanatory power?
Such "stodgy, old corporate lawyers" are going to become extremely antagonized should they discover that somebody pulled a fast one on them. All you'd have to do is open a web browser and click around to show them that the tests were still accessible.
So what's confusing is the youtube-dl side's strategy. Are they really trying to pull a fast one? That would be incredibly unwise, so I doubt it.