Script Summary: Maximize the size of HTML 5 <video> elements in the window by double clicking them. Double click again to return video to original size on page. For Firefox 3.5 or higher. Hold Shift while double clicking to enable a cool background color matching effect(does not work on all sites, see desc. for details).
Version: 1.5
To completely go to full screen, use this script in combination with the firefox "View" -> "Fullscreen" menu item (Keyboard shortcut F11).
New feature with v 1.5 is the ability to blend in the background color to match the video. Hold the shift key while double-clicking to enable this feature. This may not work on some sites due to the same-origin security policy in firefox: the domain of the current page and the video source must match exactly.
Even if only the subdomains are different(eg. media.example.com vs example.com) it will not be allowed.
Not many video sites support the video element yet. If you are looking for a site to try this out on, http://tinyvid.tv is one such site.



