Youtube

<div class="responsive-video">
    <iframe width="853" height="480" src="//www.youtube.com/embed/npfu0fN9GUA?wmode=transparent" frameborder="0" ></iframe>
</div>

Vimeo

<div class="responsive-video">
    <iframe width="1920" height="1080" frameborder="0" src="//player.vimeo.com/video/106249100"></iframe> 
</div>

<Embed>

<div class="responsive-video">
     <embed  src="/portals/33/movie.swf" type="application/x-shockwave-flash" allownetworking="all" allowfullscreen="true" allowscriptaccess="always" wmode="Opaque"></embed>
</div>

<Video>

<div class="responsive-video">
    <video width="1920" height="1080"   autoplay="true"  loop="true"  muted="true" poster="cover.jpg"  >
    <source src="/portals/33/movie.m4v" type="video/mp4"></source>
    <source src="/portals/33/movie.ogv" type="video/ogg"></source>
    <source src="/portals/33/movie.webm" type="video/webm"></source>
    Your browser does not support the video tag. </video>
</div>