As someone who uses YouTube for ~12 hours a day and has been paying for Premium since it was first offered (as YouTube Red) here is what I do:
- Listen to / watch podcast (2 - 4 hours)
- Watch videos from a handful of creators like Linus Tech Tips or Tom Scott (3 hours)
- Listen / watch various conference talks (1 - 2 hours)
- Listen to music (~6 hours)