Arghh it annoys me so much! I'll try the https and ?1 trick, but I've changed the DNS to Google and still have the same problem.
Block the proxy cache request as mentioned in my previous post.
This has worked for me for the last week or so. The video can still take a few seconds to load, but after that it's fine.Simplest fix for those using the superhub is to add the following to your host file
It's in /Windows/System32/Drivers/etc/hosts and you'll need to run any editor with admin privileges on Windows 8 to save it.
Once done it will by-pass the youtube cache proxy that VM seem to have failed to implement correctly.
*EDIT* Make sure to clear your browser cache or some videos may not work.
possibly not throttling. it may be youtube servers that possibly get overloaded.
A thread was created over on the VM forums regarding blocking the YT caches, http://community.virginmedia.com/t5/Up-to-120Mb-Speed/Tired-of-YouTube-buffering/td-p/1746698.
Yet to try it though.