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video twitter not working

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My OS info: DISTRIB_ID=Ubuntu DISTRIB_RELEASE=15.04 DISTRIB_CODENAME=vivid DISTRIB_DESCRIPTION="Ubuntu 15.04" (Lubuntu 15.04 Vivid Vervet)

I have problem when i browse twitter can't play a type of videos, youtube and vine works fine in twitter. this video works only if i enter (mobile.twitter.com) but in twitter.com i have this message (This browser does not support video playback).

My OS info: DISTRIB_ID=Ubuntu DISTRIB_RELEASE=15.04 DISTRIB_CODENAME=vivid DISTRIB_DESCRIPTION="Ubuntu 15.04" (Lubuntu 15.04 Vivid Vervet) I have problem when i browse twitter can't play a type of videos, youtube and vine works fine in twitter. this video works only if i enter (mobile.twitter.com) but in twitter.com i have this message (This browser does not support video playback).

Modified by hatpot

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I would suggest you to go through this article - how to add missing HTML5 video support in your browser. In firefox all the HTML5 video supports and h.264 videos formats too but may be you had some problem - here is the link - http://www.ghacks.net/2011/03/15/how-to-add-missing-html5-video-support-to-your-browser/