Scale HTML5 Video and Break Aspect Ratio to Fill Whole Site

HTML5 video fit width OR height

Solved it myself with a javascript function:

window.addEventListener('resize', resize, false);

video.height = 100; /* to get an initial width to work with*/
resize();

function resize() {
videoRatio = video.height / video.width;
windowRatio = window.innerHeight / window.innerWidth; /* browser size */

    if (windowRatio < videoRatio) {
        if (window.innerHeight > 50) { /* smallest video height */
                video.height = window.innerHeight;
        } else {
            video.height = 50;
    }
    } else {
        video.width = window.innerWidth;
    }

};

HTML5 Video scale modes?

I figured it out by using the same function I wrote about here.

If you have a element on the page, this jQuery resizing function will scale the video to be full bleed of the browser window.

By changing the browserHeight and browserWidth variables you could have the video scaled to fit a DIV (make sure you set that DIV to overflow:hidden).

This function will also resize dynamically with the browser window.

    var sxsw = {

    full_bleed: function(boxWidth, boxHeight, imgWidth, imgHeight) {

        // Calculate new height and width...
        var initW = imgWidth;
        var initH = imgHeight;
        var ratio = initH / initW;

        imgWidth = boxWidth;
        imgHeight = boxWidth * ratio;

        // If the video is not the right height, then make it so...     
        if(imgHeight < boxHeight){
            imgHeight = boxHeight;
            imgWidth = imgHeight / ratio;
        }

        //  Return new size for video
        return {
            width: imgWidth,
            height: imgHeight
        };

    },

    init: function() {
        var browserHeight = Math.round(jQuery(window).height());
        var browserWidth = Math.round(jQuery(window).width());
        var videoHeight = jQuery('video').height();
        var videoWidth = jQuery('video').width();

        var new_size = sxsw.full_bleed(browserWidth, browserHeight, videoWidth, videoHeight);

        jQuery('video')
            .width(new_size.width)
            .height(new_size.height);  
    }

};
jQuery(document).ready(function($) {       

    /*
     * Full bleed background
     */

    sxsw.init();

    $(window).resize(function() {

        var browserHeight = Math.round($(window).height());
        var browserWidth = Math.round($(window).width());
        var videoHeight = $('.wd-thumb-list li a').eq(0).attr('data-wd-height');
        var videoWidth = $('.wd-thumb-list li a').eq(0).attr('data-wd-width');

        var new_size = sxsw.full_bleed(browserWidth, browserHeight, videoWidth, videoHeight);

        $('video')
            .width(new_size.width)
            .height(new_size.height);        
    });

});

Fully responsive HTML5 video

Use width and max-height on the <video> element:

<div id="player-overlay">
    <video>
        <source src="../static/video/10s.mp4" />
        <source src="../static/video/10s.webm" type='video/webm; codecs="vp8, vorbis"' />
        <source src="../static/video/10s.ogv" type='video/ogg; codecs="theora, vorbis"' />
    </video>    
</div>

video {
    width: 100%;
    max-height: 100%;
}

http://jsfiddle.net/fHG69/

Also, you're missing a semicolon after background-color. When absolutely positioning an element to fill the screen, I prefer to set top, bottom, left, and right instead of setting height and width.

Make HTML5 video poster be same size as video itself

You can use a transparent poster image in combination with a CSS background image to achieve this (example); however, to have a background stretched to the height and the width of a video, you'll have to use an absolutely positioned <img> tag (example).

It is also possible to set background-size to 100% 100% in browsers that support background-size (example).

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Update

A better way to do this would be to use the object-fit CSS property as @Lars Ericsson suggests.

Use

object-fit: cover;

if you don't want to display those parts of the image that don't fit the video's aspect ratio, and

object-fit: fill;

to stretch the image to fit your video's aspect ratio

Example

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