Ninzio slider supports html5 video formats (mp4/m4v, ogg/ogv, webm). But all these video formats are no supported among all devices and browsers. That is why, to make html5 video cross-browser and cross-device compatible you need to follow these steps
 
  • Download http://www.mirovideoconverter.com/ video converter and install it. It has very intuitive and simple interface
  • Convert your video to all formats (mp4/m4v, ogg/ogv, webm)
  • Converter will generate ready to use html index page, you don’t need that page, you need only videos
  • You can find it in html5video of generated folder
  • Upload these video files ot your website and give the links to Ninio video background video
  • Open your .htaccess file (your wordpress installation root) in notepad or similar editor and paste this code
 

AddType video/ogg .ogv
AddType video/mp4 .mp4
AddType video/mp4 .m4v
AddType video/webm .webm

 
Save it. That is all. Now you will have html5 video, that supports google chrome, firefox, ie9 and above, safari, opera, ipad, iphone, android.