Puppy biting himself, paws, legs etc, normal?

Hey folks, my goldendoodle is 14.5 weeks old, and he tends to bite himself a bit more lately. I believe hes started teething pretty hard, but just wanna make sure it's nothing to worry about. He'll lick his paws, bit like leg, put his whole paw/leg in his mouth (i think teething). I of course provide teething toys to distract too, but just wondering if this is normal? We chews on his tail at times too. I asked vet and they said it's fairly normal, but want some further advice as that was a couple weeks ago.

I worry especially when hes in crate at night, I can see on the camera while hes settling before he sleeps he licks, bites, nibbles paws legs non stop until he sleeps.