- Install the app 'Hidden Settings for MIUI'
- Open it and go to 'Manage Applications'
- Select 'NewPipe'
- Click 'Advanced'
- Select 'Open by default'
- For 'open support links' select 'open'. For 'supported links' select 'open youtu.be and other URLs'
Anytime you click a YouTube link it will now open in NewPipe, no matter what app you're in.
I do use Storygraph. It allows you to add any missing book.