So if there's anything resembling source, it's more of a diff of a certain YouTube app version you can't just cleanly upload somewhere or even apply to new versions.
The problem, of course, is that bogus DMCA claims are enough to take down a repository, and protesting those DMCA claims will dox you to the big tech companies.
Every time a project like this goes down, I feel more like there should be some kind of Gitea server hosted on a hidden service where "illegal" projects like these can be developed.
While not a Gitea server per se (GitLab instead), git.rip used to be a well-known host for pirated content, leaked source code, and various other things. If I remember correctly, the amount of content on there was in the hundreds of terabytes, which would have made it very hard to externally archive (not even taking into account bandwidth restrictions).