Right now most of files are working.After doing lot of tries not sure what actually works and how suddenly autoplay start showing like the pic shown above.
1.Changed default apps to WP
2 Used this button created by Leo Register or Unregister DLL or OCX
3.I have disabled movie plugin but since WMP preview handler is not what i want to use so i just removed few extensions from it so that ActiveX takes control.As ActiveX still not able to play webm files.WMP preview handler just plays files but i have to click twice to play the video and it has white background too.ActiveX is able to play even 15gb mkv files which i didn't expect at all.
Here's setting i am using.
