ReVanced Manager

Download and install MicroG so you can log into your Google account and access your subs and watch later

Download the latest ReVanced Manager APK and install it

Open the manager and go to patcher

Select application

Tap on YouTube and check what the recommended version is

Go to APK mirror for the YouTube APKs

Find the version that matches what the manager recommends

So as of right now, it's version 17.36.37

Go into that version

Under the downloads, find the option that says "APK" in grey

Download that

When it's downloaded, go back to the manager and go to patcher

Select application then storage

Select the YouTube APK you downloaded

Check the boxes for the patches you want (just don't select debugging - I recommend selecting all patches apart from the debugging one)

Hit patch

Wait a while

Once it's done, hit install

Open YouTube ReVanced and log into your Google account

Done!