When Plex rolled out it's auto quality/auto bandwidth adjustment it actually worked very well over airplane satellite wifi as well. I watched a few things from my own server.
I'm amazed that service allowed streaming though...
For a good few years, a lot of airlines had Netflix and Hulu throttled on their free WiFi services, but not Twitch, so I’d just watch videogames on all my flights. My theory (which I really believe is true) is that they just hadn’t heard of it, and hadn’t blacklisted it!