Come on, don’t waste Tor resources for downloading pirated content. That’s what VPNs are for. Journalists and activists in countries like Russia, China, Iran, Saudi Arabia, etc. rely on Tor in order to do their work, just use a VPN for downloading, it’s also much faster.
Mullvad is great. Also check out IVPN, they are kinda similar to Mullvad (they also allow for anonymous registration without an Email address and they accept anonymous Monero payments). Maybe take a look at AirVPN if you need port forwarding.
I use IVPN and I’m very happy with them. They allow you to make an account without giving out your Email address, you just get a random-generated Account ID (Mullvad does the same btw). They also allow you to pay with Monero, an anonymous crypto currency. I used Mullvad before, Proton VPN and AirVPN are great options as well.
LibreTube isn’t broken, it’s the Piped instances that have issues. You just need to switch to another Piped instance in the settings. Click on the three dots, then select settings, go to ‘Instance’ and at the top you can hit ‘Choose…’ to change the Piped instance. I haven’t experienced any issues with adminforge.de. kavin.rocks also seems to work well.
The biggest concern is that even if you are innocent, your data can and likely will at some point be used against you. This was proven by the Snowden Leaks. There are more than enough of these unfortunate cases, here are some examples: