This has been asked before, and this is how I and others do it.
The Player is called VLC. See thread
http://www.zionworx.org.uk/forum/viewtopic.php?t=540&highlight=vlcThis thing will play virtually ANYTHING. DVD, VCD, and any other media format almost.
The best part is that when Zionworx is up and has control over the second monitor displaying lyrics/background/black VLC will play the video over the top of it. You dont have to do anything to Zionworx to get the DVD up on the wall. Close VLC and BAM...you are back in the lyrics or whatever.
Below is the config for VLC that will set this up:
1. Firstly update VLC to version 0.85 as it has fixed a number of the bugs in v0.84
2. Edit the shortcut to VLC so that there are no options after vlc.exe
3. Reset VLC's preferences (Then restart VLC)
4. "Settings - Preferences" ... tick "Advanced Options"
4.a. Under Video/Output Modules set "Video output Module" to DirectX.
5. Set display device in "Preferences/Video/Output Modules/DirectX". You will have to press "Refresh List" then select "\.\\DISPLAY2"
6. Set "Full Screen" in "Preferences/Video"
7. Unitck "Embed video in Interface" under "Interface/Main Interfaces/wxWidgets"
8. Click "Save"
9. Restart VLC
Good Luck!