I tried really hard to get a named CloudFlare tunnel working with a domain name I registered (I share my personal home videos with a non technical family member in Italy) but couldn’t get it working no matter what I tried.

We can go further. We could take away your fancy "URL"s and just use IP addresses for navigation.

Heck, we could do away with TCP/IP altogether and network over serial. It’s a perfectly functional protocol with several baud rates to choose from. I like ol’ reliable 9600, but I sometimes dabble in 115200 when I’m feeling adventurous.