Considered the same with my 4yo, but she was fast asleep since hours before. I'll be sure to show her tomorrow though! Not every day you see someone launch an astronaut in a car into space, then land two boosters next to eachother.

We already dig other nice videos on youtube with rocket launches and the like. "How it's made" and so on. Some manufacturing videos have, believe it or not, caught her attention for half an hour! I think it was especially a video from manufacturing the Mini (car), lots of robots and automation.