If you guys still having issue on peak times try this. confirmed to be working by people on virgin forum.
From what I understand this streaming issue is nothing VM can do themselves, it how google handle the servers or something like that.
Goto Start and enter WF.msc in to the search or run bar and select enter;
1. Select Outbound Rules
2. Select New Rule
3. Select Custom Rule
4. Select Next
Screenshot - files.falconevo.co.uk\VM-Youtube-Cache\vm-youtube-cache-01.jpg
5. Select All Programs
6. Select Next
Screenshot - files.falconevo.co.uk\VM-Youtube-Cache\vm-youtube-cache-02.jpg
7. Select Protocol Type - ANY
8. Select Next
Screenshot - files.falconevo.co.uk/VM-Youtube-Cache/vm-youtube-cache-03.jpg
9. Select 'These IP Addresses'
10. Select ADD
Screenshot - files.falconevo.co.uk/VM-Youtube-Cache/vm-youtube-cache-04.jpg
11. Select 'This IP Address Range'
12. Enter - From: 62.252.170.140
13. Enter - To: 62.252.170.147
14. Click OK
Screenshot - files.falconevo.co.uk/VM-Youtube-Cache/vm-youtube-cache-05.jpg
Screenshot - files.falconevo.co.uk/VM-Youtube-Cache/vm-youtube-cache-06.jpg
15. Click Next
16. Select Block Connection
17. Click Next
Screenshot - files.falconevo.co.uk/VM-Youtube-Cache/vm-youtube-cache-07.jpg
18. Make sure all network locations are applied
19. Click Next
Screenshot - files.falconevo.co.uk/VM-Youtube-Cache/vm-youtube-cache-08.jpg
20. Provide a name for the rule
21. Click Finish
Screenshot - files.falconevo.co.uk/VM-Youtube-Cache/vm-youtube-cache-09.jpg
22. You should now see a rule like the below screenshot
Screenshot - files.falconevo.co.uk/VM-Youtube-Cache/vm-youtube-cache-10.jpg