Jan Jakub Opalinski
Jan Jakub Opalinski voted up Didge Doo's answer

Temporary glitch, probably in your own computer or your ISP.

I've never had that on YouTube but I've had similar on plenty of other sites, including this one. Clear your cache and try again. If that doesn't work go do something else for a while. It'll be fine when you come back to it.

(BTW … Read more