They go into all the considerations made when working on the different versions of the suit. The original one that, well, looks great on the page in the golden age of comics, and in a live-action picture isn't very impressive-looking so they use it for the USO show, both acknowledging that, and giving us at least some screen-time for it. And a lot of effort went into making sure the one used for the rest of the time works for all purposes. It looks practical. Evans could jump around in it, perhaps a lesson learned from the black leather of the first X-Men film, or, rather, the very first time everyone wore it on set. And the equally iconic shield of course had a lot of ones sculpted. Shiny for close-ups. Rubber for hitting people with. CGI for when it couldn't be done without that. Making sure it has the exact right motion and sound effect. Everyone has something to add and explain themselves well.
I recommend this for anyone who wants to know more about the subject. 8/10