Mythtv is awesome if you want to watch live TV, DVR the live TV or watch media. I’ve never been able to get it to work easily with streamed content. However you can just download the content you want and watch it as media. Best part is you can split the backend (disks, TV tuners etc) front the frontend (playback) and have a tiny box sat next to your tv

In the UK it would cost about the same, but that would be because he went by car and needed to pay for parking, parking charges at hospitals are getting ridiculous

Are you on carrier grade NAT (CGNAT) WAN ip in the address space 100.64.0.0 to 100.127.255.255?