The only other reference I can find for that chipset is a Logitech branded card on ebay that seems to have similar outputs except one large 26 pin D-SUB connector near the top.
It’s being sold as a capture device, but again without software or drivers.
Edit: This is an archive of the winnov site, but it’ll massively post-date your card, so no idea if any of the software is relevant. https://web.archive.org/web/20000619155726/ht … winnovreply.htm
Though this page does refer to the 2.9 release not working with the older hardware, so I guess the 2.7 release could help, possibly.
Edit 2: This appears to be your card: https://web.archive.org/web/20000623052103/ht … videumavisa.htm