Virgin Media have released an update.
The latest update on this is that we've been working with Google to help them best utilise the Content Delivery Network we brought online two weeks ago and their system's algorithms should finish learning how to do that towards the end of this week. Once that's done any remaining YouTube streaming traffic using our transit links will fully move across to our dedicated peering links with Google, improving performance for YouTube.
We're also close to completing the addition of more peering capacity, which should improve performance further. Click here for some background on peering and transit links.
Work continues on troubleshooting any remaining issues with other streaming video sites but improvement is expected to be seen, particularly over this weekend.
I'll post another update later this week.
Thanks
http://community.virginmedia.com/t5/Up-to-60Mb-Speed/Video-Services-Buffering-pt3/m-p/1607660#M9949