Before I set up on my Pi4, any watchouts or concerns about remote viewing of live TV from Raspberry Pi/Channels DVR server?
I believe that it's limited to a single remote steam on the Pi4. Other than that, I can think of no other concerns.
You’ll also want to confirm you have decent and reliable upstream bandwidth from the location where the DVR server is located. I’d say minimum 10Mbps.
The pi4 hardware can only handle 1 transcode session.
Commercial detection also will be significantly slower on its hardware.