Yes, fairly consistent. Vimeo just now again. First 25 seconds played perfectly, then the buffering starts and pretty much stops playing. Youtube loads a segment very quickly, then pretty much stops loading until video catches up, video pauses, then loads the next segment quickly... etc etc.
We'll need to do more testing on our side - but we're not seeing the same issues on our side.
Uploaded some personal videos to YouTube last night was super-fast and was watching some old stuff in my subscription channels - definitely not a network issue.
Did you check if you had the same issue either on a capped account (like a Free GB)?