I have the IRIS Player, only the audio is coming but not the video.
The issue you've experienced might be related to codec installation. The video that you are trying to play is using an unsupported codec. To easily fix this, simply download and install a codec pack or switch to another video player.
Here are my recommendations:
Codec Pack: http://combined-community-codec-pack.software.informer.com/
Video Player: http://vlc-media-player.software.informer.com/