Updated, 9:40 p.m. to add YouTube's explanation of what caused outage.
YouTube suffered a two-hour long, system-wide outage on Sunday that the company said was triggered by a network based in Pakistan.
"For about two hours, traffic to YouTube was routed according to erroneous Internet Protocols," said YouTube spokesperson Ricardo Reyes in a statement "Many users around the world could not access our site. We have determined that the source of these events was a network in Pakistan. We are investigating and working with others in the Internet community to prevent this from happening … Read more