VEVO User Account Checker
Python 2, 45 bytes

-3 bytes thanks to Rod. -2 bytes thanks to ovs.



lambda s:len(s)&lt;81*s.isalnum()&lt;'VEVO'==s[-4:]


Try it online!

A regex solution turns out to be longer.

lambda s:re.match('^[^\W_]{0,76}VEVO$',s)
import re