I will keep a eye on it but till the license changes I will stick with my tried and true Newpipe and Libretube apps. Both of those are "improved revanced" to me already but the idea of multiple sources is a cool one, not new but certainly cool and I haven't seen Nebula in other attempts but I just wish people could agree on a addon standard to implement services for various of those apps and media centers at once!
Mine wasn't for a while then I realised the other say the v0.19 was available on the izzydroid repo but not yet on fdroid and that resolved some issues for me
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!