I watched it twice and you’ve watched it and likely many others. That 320 number is “frozen” to keep it from going viral. The producers should raise hell.
Actually I don't think YouTube does a real time update. Give it a few hours or a day and check back. If it's still 320 then you have a case.
The number of views seems to be updated on a periodic basis...not in real time.
For some reason videos views get stuck around 300 then quickly catch up to the actual number of views. That being said we need work at getting this out to family and friends. EXCELLENT.