Hello,
You didn't mention what TV tuner card is in question. So this advice suits to 'general advice only'.
- You need to write an device driver or adapt an existing device driver 'TV picture' memory and somehow transmit this over network.
for example...
- using streaming services (W2K advanced server)
- writing 'TV picture' (in server machine ie. the computer which the card is installed) to the memroy mapped file. Clients then read that memory mapped file and 'construct TV picture' in their screens.