Hopefully this hasn't been posted before!

https://www.theregister.com/2020/08/...s_walkthrough/

The Register has an article about the bits you don't get to see onboard a 747, such as the floppy disk drive in the cockpit, and the IFE system (which runs Windows NT4, circa 1996, on a 747).

The actual video is here:


Like many of us I've flown on them (but no more, sadly) and I found it fascinating to see just how much stuff is involved behind the scenes.