Edit in JSFiddle

<div class="player">
    <div class="mediaplayer">

        <video poster="http://corrupt-system.de/assets/media/caminandes/caminandes.jpg" controls="" preload="none">
            <source src="http://corrupt-system.de/assets/media/caminandes/caminandes.m4v" type="video/mp4" />
            <source src="http://corrupt-system.de/assets/media/caminandes/caminandes.webm" type="video/webm" />
        </video>
        <h2 class="title">Caminandes: Gran Dillama</h2>
        
        <ul class="share-buttons">
            <li>
            <div class="fb-share-button" data-href="http://afarkas.github.io/webshim/demos/index.html" data-type="button"></div>
            </li>
            <li>
                <div class="g-plusone" data-annotation="none" data-href="http://afarkas.github.io/webshim/demos/index.html"></div>
            </li>
            <li>
                <a href="https://twitter.com/share" class="twitter-share-button" data-url="http://afarkas.github.io/webshim/demos/index.html" data-count="none">Tweet</a>

            </li>
        </ul>
    </div>
</div>
<p>This example adds a social box and a title overlays to a mediaelement</p>

<div id="fb-root"></div>
<script>(function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s); js.id = id;
  js.src = "//connect.facebook.net/de_DE/sdk.js#xfbml=1&appId=127610198929&version=v2.0";
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script>
<script>
  window.___gcfg = {lang: 'de'};

  (function() {
    var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;
    po.src = 'https://apis.google.com/js/platform.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);
  })();
</script>

.mediaplayer .title {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 3px 3px 1px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    transition: all 400ms;
    opacity: 0;
    visibility: hidden;
}

.mediaplayer ul.share-buttons {
    position: absolute;
    top: 5px;
    right: 5px;
    margin: 0;
    padding: 3px 3px 1px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    transition: all 400ms;
    opacity: 0;
    visibility: hidden;
    list-style: none;
    z-index: 9;
}
.mediaplayer ul.share-buttons li {
    margin: 2px 0;
    padding: 2px;
}

.mediaplayer[data-state="idle"] .title,
.mediaplayer[data-useractivity="true"] .share-buttons,
.mediaplayer[data-state="idle"] .share-buttons:hover {
    visibility: visible;
    opacity: 1;
}



.player {
    margin: auto;
    padding: 10px;
    width: 95%;
    max-width: 900px;
    min-width: 320px;
    font-family: sans-serif;
}

.mediaplayer {
    position: relative;
    height: 0;
    width: 100%;
    padding-bottom: 56.25%;
    /* 16/9 */
}

.mediaplayer video, .mediaplayer .polyfill-video {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
}

webshim.setOptions('mediaelement', {
    replaceUI: 'auto'
});

webshim.polyfill('mediaelement');