Every once in a while I'll get the same problem with videos. I could be your internet connection or your web browser. Try setting your browser to their installation defaults, try resetting your modem / router (power cycle), and finally try shutting down your pc and reboot it. Also check your firewall.
it magicaly worked with firefox xD
Strange, with chrome was downloading so slow and was corrupted mhm... I'm pretty sure this pc is free of garbage