TV tuner card? HAve you got someting that looks like an Aeria connection on the rear of the PC?
"Video in" socket at the back of my Mesh computer which has a mauve cable leading to a mauve four pin socket marked 1. Red coloured R Audio out. 2. White coloured L Audio out. 3. Yellow coloured Comp Video out. 4. Black coloured S-Video out.
Confused by "Video In" but all sockets marked as OUT?
I connected these to a scart adaptor which is plugged into the VHS player but the VHS player did not play on the computer desktop.
You need Capture software to play the signal being recieved (if it is recived? see above)
The software really needs to suit your aptur device.
What make and model of Mesh, maybe we can find if it has capture facilities?