No sound in Steam videos

Hi all,



for past couple of days the sound in Steam videos (i.e. the video trailers in game's store page) is broken. Now I have no sound in these videos.



There is no sound ONLY in Steam videos - everything else works fine (games, youtube etc..)



There is no sound in these Steam videos in every browser - in Steam client, in Firefox, in Chrome.



I have Windows 7 x64 and the problem persists only for several days. I checked the mute/unmute button in Steam video player, I checked the settings in Windows volume mixer. No luck.



Please advise.



UPD: Seems there is no sound at all in Steam store now. Just checked my other two boxes: one laptop with Windows 7 x64, the other is a Fujitsu Esprimo nettop-box with Windows 8.1 x64 - no sound at all three computers...

No sound in Steam videos