How do I make a video fit my whole screen?
5 – Toggle the “Zoom to fill screen” setting to On. That's all there is to it. From now on every video you watch in full-screen mode should cover the entire screen with no black bands on its sides. Note: Be aware that the “Zoom to fill screen” feature will likely “crop” the long edges of the video you're watching.
How do I make a video full screen in HTML?
HTML 5 provides no way to make a video fullscreen, but the parallel Fullscreen API defines an API for elements to display themselves fullscreen. This can be applied to any element, including videos. Browser support is good, but Internet Explorer and Safari need prefixed versions.