Video player extremely slow

I've looked through the first few pages on the Technical Support board and I'm not sure if this is a common problem or not.

The video player is running extremely slowly for me and has been since E3. Live videos seem ok but streaming anything else on the site hardly works at all, even at the lowest resolutions. I have 50mb broadband and can normally buffer 1080p clips several minutes long in a matter of seconds.

Any ideas what the issue is?

I have the same problem, videos will buffer too often. I have a 10Mb connection and untill yesterday i was fine.