When I use Windows Media Player to play a DVD video on windows 7, there is no video on dvd playback or PC gets the message “Cannot play DVD video.".
There are some possible reasons:
1. The video card driver is out-of-date.
Go to download the last driver and install it.
2. Your PC without a compatible DVD decoder.
3. Your computer hardware is not powerful enough to play DVDs.
Update your hardware.