I use three apps, if one doesn't work, the other two usually do. Most often all of them work very well. It's very rare I have to switch apps these days, but things were bumpier in the past.

https://github.com/teamnewpipe/newpipe (the OG app, most reliable)

https://github.com/wizdom13/WizeStream (my current fave, best features)

https://github.com/InfinityLoop1308/PipePipe (very reliable, lots of features)