I also struggled with youtube last night. Was buffering quite hecticly on my 10 mbps bundle.
Downloads earlier that night was flying though. So not sure what happend later.
Btw. My girlfriend tried to download a private video she has access to on vimeo for two days now and after hours its only on like 0.2%. Any idea why this is?
From my own tests the network was running fine in the North (was watching Key & Peele on YouTube - laughed my head off). From what I could see the South was not under strain so services should have been perfect. Did you notice a general throughput issue around that time?