Thanks Paul for the reply.
Yes iphone or android both can play mp4. To
test that I have written a simple application hosted by IIS that was being successfully played by iphone and android.
But when the WebSphere come into picture, the problem starts then. That mp4 was served by both IIS and WebSphere, as I have mentioned before that we are running WebSphere under a Windows Server 2008(IIS 7.5).
Please suggest what do you think might cause this issue. Thanks beforehand.