Update: Can't see to get things working in Firefox : (

How can I display custom video controls when the in fullscreen mode in modern browsers?

They disappear as soon as I go fullscreen. I'd like them to be available, and then I'll write some JavaScript to hide them on inactivity and show them once someone wiggles their mouse around.

HTML:

<video#video src="vid.mp4" preload poster="/images/poster.jpg">
  <iframe src="https://youtube.com/embed/id" frameborder="0" allowfullscreen>
</video>

JS:

var bigPlayButton = document.getElementById('big-play-button')
var video = document.getElementById('video')
var playPauseButton = document.getElementById('play-pause')
var fullscreen = document.getElementById('fullscreen')

function toggleFullScreen() {
  if (!document.fullscreenElement) {
      document.documentElement.requestFullscreen()
  } else {
    if (document.exitFullscreen) {
      document.exitFullscreen()
    }
  }
}

fullscreen.addEventListener('click', function (event) {
  if (!video.classList.contains('fullscreen')) {
    video.requestFullscreen()
  } else {
    document.exitFullscreen()
  }
}, false)

// Detect FullScreen changes and adjust button
document.addEventListener('fullscreenchange', function (event) {
  if (document.fullscreenElement) {
    fullscreen.children[0].src = '/images/nofullscreen.svg'
    video.classList.add('fullscreen')
  } else {
    fullscreen.children[0].src = '/images/fullscreen.svg'
    video.classList.remove('fullscreen')
  }
}, false)

CSS

video::-webkit-media-controls {
  display: none !important;
}
#custom-video-controls {
  z-index: 2147483648;
}

I'm using this polyfill: https://github.com/neovov/Fullscreen-API-Polyfill

Edit

The significant change was targeting the parent tag: .vidFrame for fullscreen instead of the <video> tag as per Kaido's comment.

HTML5 video's controls need special handling if you want to override them. I'm assuming you want to do that since the controls already have the full screen feature built in the controls. This demo implements:

classList for toggling the button#fullScreen states of .on and .off and button#playPause states of .play and .pause.
:fullscreen pseudo-class to insure .vidBar is on the bottom when in full screen mode.
Shadow DOM CSS Styles that are needed to override the native player's controls.
Fullscreen API vendor specific methods to enter and exit full screen mode of course.
There's no volume slider, mute button, or scrubber, just the full screen button (button#fullScreen) and play button (button#playPause). If you want them, ask another question.
Details are commented in source.

It looks as if the Snippet isn't fully functional, so here's a functional Plunker. If that version cannot be reached, then review the embedded Plunker and click the full view button:

Demo

Note: SO sandbox has changed so this demo is not fully functional go to the links mentioned previously or copy and paste the demo on a text editor.

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Full Screen Video Toggle</title>
<style>
.vidFrame { position: relative; top: 10%; width: 320px; height: auto; min-height: 180px; outline: 1px dashed red; }
.vidBar { position: absolute; bottom: 0; right: 0; left: 0; height: 40px; width: 99%; }

#fullScreen { position: absolute; bottom: 0; right: 0; width: 36px; height: 36px; outline: none; border: 1px solid transparent; border-radius: 6px; display: block; cursor: pointer; }

#fullScreen:hover { border: 1px groove #0ef; }
.on, .off { background: url('https://i.imgur.com/0FTwh6M.png') no-repeat; width: 36px; height: 36px; }
.off { background-position: 0 0 }
.on { background-position: -1px -50px }

#playPause { position: absolute; bottom: 0; left: 0; width: 36px; height: 36px; background: none; font-size: 36px; color: #0ff; line-height: 1; border: 1px solid transparent; display: block; cursor: pointer; outline: none; }
#playPause.play:before { content: '\25b6'; }
#playPause.pause:before { content: '\275a\275a'; }

.vid { position: absolute; top: 0; left: 0; right: 0; bottom: 0; width: 100%; height: auto; display: block; z-index: 1; outline: 1px dotted blue; }
/* 
Fullscreen Pseudo-class: 
https://developer.mozilla.org/en-US/docs/Web/CSS/:fullscreen 
*/
.vidBar:-moz-full-screen { position: fixed; }
.vidBar:-webkit-full-screen { position: fixed; }
.vidBar:-ms-fullscreen { position: fixed; }
.vidBar:fullscreen { position: fixed; }
/* 
Special Shadow DOM Settings to Override Default Controls: 
https://css-tricks.com/custom-controls-in-html5-video-full-screen/ 
*/
video::-webkit-media-controls-enclosure { display:none !important; }
.vidBar { z-index: 2147483648; }
</style>
</head>

<body>
<figure class="vidFrame">
  <video id="vid1" class="vid" src="http://techslides.com/demos/sample-videos/small.mp4"></video>
  <figcaption class="vidBar">
    <button id='playPause' class="play" title="Play/Pause Video"></button>
    <button id='fullScreen' class="on" title="Enter/Exit Full Screen"></button>
  </figcaption>
</figure>
<script>

/* 
Toggle Button with classList: 
https://developer.mozilla.org/en-US/docs/Web/API/Element/classList 
*/
var fullBtn = document.getElementById('fullScreen');
var playBtn = document.getElementById('playPause');

playBtn.addEventListener('click', function(event) {
  var player = document.getElementById('vid1');

  if(player.paused) {
    playBtn.classList.remove('play');
    playBtn.classList.add('pause');
    player.play();
  } else {
    playBtn.classList.add('play');
    playBtn.classList.remove('pause');
    player.pause();
  }
}, false);

fullBtn.addEventListener('click', function(event) {
  var tgtEle = document.querySelector('.vidFrame');
  var  onOrOff = fullBtn.classList.contains('on');

  if (onOrOff) {
    enterFS(tgtEle);
    fullBtn.classList.remove('on');
    fullBtn.classList.add('off');
  } else {
    exitFS();
    fullBtn.classList.add('on');
    fullBtn.classList.remove('off');
  }
}, false);

/*
Fullscreen API:
https://developer.mozilla.org/en-US/docs/Web/API/Fullscreen_API
*/
function enterFS(element) {
  if (element.requestFullscreen) {
    element.requestFullscreen();
  } else if (element.msRequestFullscreen) {
    element.msRequestFullscreen();
  } else if (element.mozRequestFullScreen) {
    element.mozRequestFullScreen();
  } else if (element.webkitRequestFullscreen) {
    element.webkitRequestFullscreen();
  }
}

function exitFS() {
  if (document.exitFullscreen) {
    document.exitFullscreen();
  } else if (document.msExitFullscreen) {
    document.msExitFullscreen();
  } else if (document.mozCancelFullScreen) {
    document.mozCancelFullScreen();
  } else if (document.webkitExitFullscreen) {
    document.webkitExitFullscreen();
  }
}
</script>
</body>
</html>

来源：https://stackoverflow.com/questions/38134629/how-to-display-custom-video-controls-even-in-fullscreen

标签

html5

video

fullscreen

How to display custom video controls even in fullscreen

Edit

Demo