Jim,
Les is correct with requiring the codec package installed on the local machine.
Here are the links to download the codecs and installation instructions.
Todd Robinson has shared 2 files with you.
Click the links below to view the files:
en_Matrox_VFW_Software_Codecs_10.pdf
https://rossvideo.centraldesktop.com/p/eAAAAAAAANSVAAAAAGvFoxc
VFWCodecs_10.exe
https://rossvideo.centraldesktop.com/p/eAAAAAAAANSWAAAAADF8N6Y
The codec package only coveres video decoding, so there may still be issues with audio inside Windows media Player.
I can help you resolve that as well if this does not work.
Todd