For the fitting nerds this might be of interest. Happy’s a friend of mine (and solved some of my problems). Two hours is a lot and the topics can be dry but for those of use who eventually want to build for folks that have more specific fitting needs there’s some good info.
There’s also a part 2 on the youtubes.
I use https://bikeinsights.com/ quite a lot looking for bikes as it allows free reverse searching by stack/reach/material and more. I have relatively long legs so I can prefilter bikes with higher stack. Also interesting to see how many bikes are made with a specific geometry in mind.
Big BikeInsights fan here too (and another cyclist with long legs). The seach filters they have are really comprehensive. I also love that you can also input custom geometries and compare them to off the shelf offererings. Can be a bit of a sanity check at times.
Thank you! I watched all of those.
Happy’s enthusiasm brings a smile to my face 
Wish I can get fit by him before he stopped doing it…