I am more inclined to suspect it is an issue with the CDN than with ISP. (Which is why I decided to pop over here to the Shaw forum and see if there was a similar thread.)
One thing us Telus users have noticed is that even when YouTube performance is too slow to watch normal videos in HD, the "test video" at »youtube.com/my_speed still loads quickly and will play fine in HD. I'm curious if any Shaw folks have experienced the same.
what makes you think ISPs don't have their own CDN? please..i'm trying to state the obvious...
I'm sorry, but I guess I'm missing what you mean. Instead of "trying" to state it, could you just state it?
ISPs might have a CDN for their own content, but it is specifically YouTube that we are talking about here. Perhaps Google might hire CDN services from regional ISPs, but I would still consider that to be part of "the YouTube CDN."