It uses Piped servers to proxie the videos which hide your IP address but those servers are run by volunteers and aren’t always perfect so it’s more of a hit or miss but if one doesn’t work I usually switch and doing that between kavin.rocks, libre.kavin.rocks and adminforge.de usually works very well for me, I just wish there was a proper way to store my subscriptions locally beside not using a Piped account at all!
Yea, it’s crashy enough already but one of the last few updates was a fucking mess!