It's probably correlation information that allows them to pull further diagnostic information.

Mind sharing what information you have which makes you think they were hacked? :)

Pretty sure the "hash" is just some encoded debugging data and logs.

Because, of course, when you hack Youtube you put a hash up there.

It's an encrypted, base64 encoded, traceback w/ some other data. They could get it from logs, but it comes in handy when individuals are reporting issues.

I don't believe that means they were hacked.