there was already an attempt to take it down back in 2020/2021 [0]. The DMCA claim's main argument was that ytdl was circumventing Techincal Protection Measures (TPMs) in order to access the content. Thanks to a letter from the EFF [1] which explains how ytdl accesses content in the same way that a browser does (i.e. it does circumvent anything such as DRM), github rejected the takedown.

this is also why ytdl has stood firm in saying they will never attempt to be compatible with anything protected by DRM.

[0] https://github.blog/news-insights/policy-news-and-insights/s...

[1] https://github.com/github/dmca/blob/master/2020/11/2020-11-1...