I guess this is a pretty old idea. I went to sim lim square today and for the project of splitting from my amp to my tv and my recorder I needed another display else I wouldn’t know my recorder is working or not. What if I just recorded a bunch of black screen. So I thought I would have another display for my recorder which could be a small mini photo display or maybe just use my old laptop, tablet or phone as a display but I couldn’t find anything that works. There are plenty of devices that maps your phone display to your tv but not the other way around. Now I am just plugging in the recorder to the hdmi port 2 of the tv and the direct one to hdmi 1 port of the tv.