I seen this and it said it can provide convert a iptv stream to coax so I can connect directly to a tv input. Could this work?
It's also this too
Edit: This would be a great product idea so a good proof of concept would be getting a raspberry pi (my two 3B+'s crapped out on me) and a modulator and try a stream out.
Like the post says "crackpot" but if I was to figure something out with the channel switching and maybe the quality would this be something you would try/use?
i bet its better use nvidia shield or stream + with those you can combine atsc and iptv channels.
i was checking that too for other use your second link it was 230 in last black friday , cheap but still expensive imo