[mriver8 (OP)]

Location even if they are not physically connected?

[CliffordK]

Look up:
Wireless Audio Video AV TV Sender Transmitter & Receiver

It should pick up a few devices for use in home.  Attach one to each TV, and share a common video feed between the two.

I believe there was also a service for caching and viewing cable TV programs over the internet.  Was that Virtual Digital Cable?  Perhaps it has gone under.

[RD]

From mriver8's previous posts I think they're looking covert surveillance of [their] computer monitor.

It is possible to read CRT displays from a [short] distance ...

[ But who uses CRT displays these days ? ]