<video controls>
   <source src="http://www.sololearn.com/uploads/video.mp4" type="video/mp4">
   <source src="http://www.sololearn.com/uploads/video.ogg" type="video/ogg">
   Video is not supported by your browser
</video>

Another aspect that the audio and video elements have in common is that the major browsers do not all support the same file types. If the browser does not support the first video type, it will try the next one.