will not play video in you tube. have ff 3.6.14
will not play videos in you tube. plays audio
will not play videos in you tube. plays audio
Opaite Mbohovái (1)
Problem is related to Flash and Video drivers. Try updating your video drivers first of all.
As a temporary workaround try hovering your cursor over the place where the pop-out button should be below the YouTube video screen, then left click there. The video will then display in the pop-out screen.