When a video freezes it’s called a “rebuff,” and it happens 8% of each video stream. And when it does, 80% of viewers stop watching.

That’s according to TubeMogul, who track these things from the players it monitors. Tubemogul also allows publishers to push their content to all the major online-video sharing sites for free.

Are they refreshing and coming back? You wish.

No patience. Keep that in mind when you’re making your video too, because we’re willing to bet a pregnant pause has a similar effect.

This is another reason I can’t believe many of my clients still use Quicktime on their website instead of a flash player or YouTube or blip.tv embed.