Not quite sure if these exist. But, I have a CCTV recorder, which is plugged into my router in the kitchen, this enables me to access the live feed anywhere I have internet access. The only problem is, when I am at home I have to log onto the internet to check on my cameras. I could have an HDMI lead from the recorder to my tv to view live footage, but it would be awkward to hide the cable. Can you get a wireless HDMI dongle? Plug one dongle into the recorder and one into the back of the TV?
You would need to look what outputs are available on the recorder. AV? RF? Scart? We know that there is HDMI but with AV outputs a sender receiver is good to go as long as the distances are not far and there are no major obstacles like stone walls or reinforced concrete. Your TV should have AV inputs so just switching to AV input with your remote would bring up what is being sent via the recorder and the AV sender/ reliever.
Think I would be going with 18:40 and 18:12 posts if I were you. But please do your own checks as well. I am only giving advise. You will also need to do a little ""homework".