I feel like with all of the modern technology we have, this should be a solvable problem. I consider myself pretty tech savvy and I haven’t been able to solve it.
We sometimes take our RV out to “boondock”, that is go to a site without hookups. Sometimes, we’d like to relax and watch TV in the evening. We have a TV that we bring, and it’s not a problem to download videos from streaming services (Netflix, Prime, Hulu, etc) to our phones for offline viewing. The problem is I can’t get the videos from my phone to the TV.
I have several Chromecasts, and you’d think with guest WiFi on the Chromecast this would be simple: connect to the Chromecast guest WiFi and cast away. I can’t get that to work. I’ve tried using one phone as a WiFi hotspot and connect everything to the ad-hoc network create by that phone, but without an actual internet connection that doesn’t work (and it’s really a huge pain to try to set up.) I bought a USB-C to HDMI cable, but it turns out my phone doesn’t support screen mirroring that way. I suppose a last resort would be to find pirated copies of the shows we want to watch, download those to a USB stick and watch them with the TV’s media player. It just seems dumb that there’s no solution to this. All the pieces are there, but they won’t connect.