Want youtube premium futures for free? No problem there’s a modified version of the youtube app called youtube vanced.
You can find it at https://vanced.app
If you have a regular non rooted device you will have to install two apps to be able to login to youtube but it is still better than paying a monthly fee.
Best thing about it no more annoying ads and waiting 5 seconds for that skip button to appear. You can even lock your phone and youtube will continue to play saving battery power.