youtube video missing in media section

hi.
thanx a lot for this site, its awsome;)
i posted my first game "goods deluxe", but in media section i see only screenshots, not utube video
anyone can help?

thanx and sorry for my bad english;)

Forums: 

The thumbnail does not show up, but theres a play button which works fine

hi looks like its depends on browser, in chromium i can see video (thumbnail is bad), but in firefox there i only screenshots.
i use linux;)