I hope folks do not mind this topic here. Some time ago I came across the YouTube channel for Wendover Productions and their videos piqued my interest -- especially those covering air travel -- because I tend to want to know how and why something works the way it does. Maybe someone else will find these interesting if not useful too.
"Why is flying so expensive."
https://www.youtube.com/watch?v=6Oe8T3AvydU
"How budget airlines work."
https://www.youtube.com/watch?v=069y1MpOkQY
"The economics of airline class."
https://www.youtube.com/watch?v=BzB5xtGGsTc
"Why airlines overbook."
https://www.youtube.com/watch?v=EqWksuyry5w
"Why trains suck in America."
https://www.youtube.com/watch?v=mbEfzuCLoAQ
"Why are trains so expensive."
https://www.youtube.com/watch?v=fwjwePe-HmA
"Why planes dont fly faster."
https://www.youtube.com/watch?v=n1QEj09Pe6k
"Small planes over big oceans."
https://www.youtube.com/watch?v=HSxSgbNQi-g