NewPipe 

Pros:
I have been using this app for few years now. Some of it’s features are amazing.
The ‘Listen in background’ option helps in only hearing the audio and minimises data usage and is very helpful for podcasts.
‘Download’ option is very useful to store content locally.

Cons:
We might get an update once a month if YouTube revised it’s algorithm. NewPipe app goes down until the update is out.

I have been using NewPipe for more than 5 years to access YouTube and I must say it always works as expected. No ads, background playback, video/audio downloads, offline subscription, I use all of those features.

The app will break very rarely, but it’s not NewPipe’s fault. Google now & then makes a change in YouTube service which breaks the app, but the community finds a solution / workaround which gets fixed quickly in the next hotfix version.

Beyond YouTube, the app also has support to access video/audio contents PeerTube, SoundCloud, CCC Media, etc.,

NewPipe is a easy to use YouTube client that also supports other sources like SoundCloud oder FramaTube (both beta). It automatically blocks ads and has a built-in subscription feature, where you can also group channels e.g. to a catagory “LetsPlays”. You don’t need (and can’t use) a google account - so commenting and likes are not available.

I highly recommend using it, after I subscribed to some channels it became my daily YT client