Looks like a good fit for youtube-dl
Going after youtube-dl so publicly has a solid Streisand effect. Feel as though the lawyers aren't going to give up easily on this one and will hound them one way or another.
Regardless, there is some github alternatives available through tor:
Darktea: http://it7otdanqu7ktntxzm427cba6i53w6wlanlh23v5i3siqmos47pzh...
Rootgit: http://rootgit4rghbuenb.onion/explore/repos
And on I2P:
I have created the repo at Darktea, feel free to create your anonymous accounts and join the project, until we find a better/decentralized place.
For now this should be sufficient:
http://it7otdanqu7ktntxzm427cba6i53w6wlanlh23v5i3siqmos47pzh...
I will give the main contributors the neccessary access for reviewing/merging/etc.. or will entirely hand over the project if you can prove you are the maintainer.