As a lot of videos in this thread have disappeared, it seems like a good idea to post some of my 'goto' channels for this sort of stuff.

Starting with aircraft:
https://www.youtube.com/user/Aircrewinterview/videos?pbjreload=10
seriously this is one of the best channels out there for the range of stuff covered. It does exactly what it says on the tin- it interviews aircrew (and the odd groundcrew)
I will have to put a warning or 2 on this:- your marriage may suffer and some of the interviewees use adult language:

https://www.youtube.com/user/Bis18marck70/videos
again lots of stuff, but more concentrating on the planes

https://www.youtube.com/channel/UCynGrIaI5vsJQgHJAIp9oSg/videos
Greg does some fantastic 'in depth' stuff often with an engineering bent.

https://www.youtube.com/channel/UCnZJt7yQw5IztVwe-Dscd-Q/videos
not as much content but his timelapse vids on specific air battles are great

https://www.youtube.com/user/FlightChops/videos
very much oriented towards those learning/improving their flying but HIGHLY recommended

and on the learning note I'll leave you with one video

it's an in cockpit vid of a P51 engine out with analysis and lessons learned). I cannot recommend this one highly enough.

https://www.youtube.com/watch?v=BBpqvPujZgM