I’m not sure if it would work for your situation but you seem to be able to ssh into a server on that network? If so you can run a browser on that computer and tunnel the X session over ssh:

https://www.cyberciti.biz/tips/running-x-window-graphical-application-over-ssh-session.html

Otherwise neko seems neat, I’ve actually been looking for something for watch parties.

After having been shafted by sublime text I will never believe anything called a “lifetime subscription” is such.

A “lifetime subscription” is just a “until we decide otherwise” subscription