YouTube-DL Gitlab Backup Repository
Gitlab is not immune to DMCA notices either since it's a US company. The RIAA probably won't try to take it down unless the youtube-dl development is actually relocated there or they become aware of it somehow. You'd have to host it in a country where DMCA can safely be ignored (anonymously of course), e.g. the Netherlands or Russia, if you want it to stay up reliably.