Comment 45 for bug 434476

(In reply to :Ehsan Akhgari (needinfo? me!) (slow responsiveness, emailacopolypse) from comment #29)
> (In reply to comment #28)
> > We should disable the screen save for non-fullscreen playback too.
>
> Why? Some websites use <video> as an element in their design these days
> (for example, as the page background.) It seems counter intuitive for such
> a website to disable the screen saver!

Because sometimes you want to watch a video non-fullscreen with duration longer than your screensaver's timeout? I certainly don't fullscreen all the videos I watch.

I think it would be hard to programmatically distinguish between the non fullscreen foreground case and all permutations of the video-as-page-background use case you describe.