1. Open XnView in Browser mode
2. Make sure that XnView's Preview video's in Browser options is OFF
3. Select a video file in Browser mode
4. Open XnView options
5. Move to Browser area and then Preview area
6. Don't alter anything just click "Ok"
7. XnView will now play the video in the preview pane
If I repeat the process a second time it doesn't happen
however a third time it does!
I just managed to lock XnView up trying this on a WMV file, funny as hell to watch too - thankfully I have Process Explorer loaded to save me
