somebody had issue with some youtube video.
some video slow to load or not loaded, some are ok...

don't know youtube change their route or new server or else.
but this is what i found, before this youtube streaming will use url contains *.c.youtube.com*, but today i found it use url contain *.googlevideo.com*

i'm system admin at xxx company, so i use live monitoring at server that can show every single link load by every client, so i know before this if i block url contains *.c.youtube.com* all youtube streaming will not loaded (only main site of youtube.com will loaded but not the streaming).

but today, i found that some youtube video streaming loaded with new url contains *.googlevideo.com*

sorry if my information is nothing to do with slow youtube streaming facing by some of us, i just share what i know (that maybe somebody already know it long time ago before me)