While that video was really solid work once again and I love learning new details like the Dolphin build that runs the game that well, I would have really liked for it to dive more into the development of the game.
AFAIK it was a 3rd person game for a rather long time? Never seen more than a screen, but I heard that it was a pretty late change for the game. The technical details about effects like Samus' face being shown as a reflection in your visor when the lighting fits or you hit something close to your face with a rocket would have also been nice, or even the GCN TEVs in general in comparison to the tech movement of the time, but I guess that's a lot of information and research for a video with a rather short production turnaround and run time.
I guess what I'm saying is, I'd love to see a feature length 'Making of' documentary on Metroid Prime