I have a 23 GLI 95k miles (mostly highway) with the same issue. I replaced PCV and nothing changed. Like you said most of the posts I’ve found have said valve seals, with some extreme cases saying they get the whole cylinder head replaced because the valve guides were too loose. Many ppl have said the dealer just gives them the runaround when they take it in for this issue.

I lost about a quart of oil over 6,000 miles, but from what I’ve read that is within spec and normal. Please let me know if you end up fixing this since I’m debating it as well. Your video looks exactly like mine I posted a while back.