video is playing in vlc player only in that pc which has vlc player otherwise it plays in windows media player
There in a nutshell is your problem: if VLC isn't installed, it can't play videos. And the chances of a random website getting permission to load an application on my PC are so close to zero as makes no difference.
All you can do is tell people they should install VLC in order to watch it. I would ignore you, because I don't like VLC, but then it is my fault. The other option is to only serve up videos that Windows Media Player can play...