HTML 5 video - poster

HTML

<!DOCTYPE html>
<html>
    <head>
        <title>Video API - Poster</title>
    </head>
    <body>
        <video>
             <source src="blob:https://cthugha.ddcr.biz:8383/9d8db4be-d9d6-4e37-b42d-01426ca6c4dd" />
        </video>
   </body>
</html>

CSS

video
{
    margin:auto;
    width:95%;
    heigth:95%;
    margin-left:15px;
    margin-right:15px;
}