Their product is straightforward feature-wise, and pushing a low-teen megabits per second of static video data on the internet in a somewhat timely manner is not a huge technical challenge nowadays (or 10 years ago).
Doing stuff like real-time video streaming, where you have to encode and push video to users with very low latency requirements (like Google Stadia) or with moderately relaxed latency but broadcast to a lot of users, like Twitch, or having a mind-bogglingly huge library like Youtube, is probably orders of magnitude harder.
I do like their shows, and probably a lot of technical wizardry VFX goes into making them, but getting the bytes to the end user is not it.
I'm sure there's a lot of adversarial smarts there, where brilliant engineers come up with incredibly complex solutions to simple problems, and it requires even more brilliance to make things run smoothly, but I'm sure their problems could be solved with simple pragmatic engineering.
