Try Nova https://f-droid.org/en/packages/org.courville.nova/ It scan your videos for movies and series and then it downloads the poster, background art, information of the serie/movie and information of each episode, you can also download subtitles.
There's also kodi https://f-droid.org/en/packages/org.xbmc.kodi which I think is a more complete option, but it was designed for TVs and not for phones. I also think the fdroid version is generally outdated.
"And move to what?"
To having a better life.
I like YouTube as much as the guy next to me, but at this point we have become to Dependant to it. Instead of watching quality content like movies, series, documentaries or animation; we end watching someone talking about that on YouTube. When we find nothing good on the platform we end watching something we don't care about just to have something to watch or having as background noise. Some people can't even enjoy a meal or sleep without YouTube. At this point YouTube is more numbing the TV ever was.
I hate what they are doing, trying to block Invidious, Newpipe and the ability to watch the platform without ads. But at the end it'll be the best for all of us except for YouTube.
Eventually YouTube will die and a new shitty monopoly will step in.