Update: it seems that the issues were resolved, and that YouTube is once again fully operational.
YouTube is currently experiencing some downtime issues, reporting a “Http/1.1 Service Unavailable” error or a a 500 Internal Server error. It’s been going on for approximately 20 minutes, and Twitter is already abuzz about the downtime.
Currently there’s no word from Google about the issues, but given its recent troubles with Chinese hackers, as well as hacker attacks on Baidu and other large web services, it’s not too far fetched to think this downtime is a result of a cyber attack. We’ll let you know when we find out more.