How to check if the browser can play mp4 via html5 video tag?

Question

How to check if the browser can play mp4 via html5 video tag?

Answer 1

Alex Polo's reply is not bad but incomplete try this to check if the codec is supported too:

var mp4Supported = (!!document.createElement('video').canPlayType('video/mp4; codecs=avc1.42E01E,mp4a.40.2'));

Likewise for ogg, webm and so on ... Works with audio too :)