I am really sad that Destin basically went mostly with the ID-perspective and I blame him being a devout Christian. Don't get me wrong, the video is well crafted, but he presented ID talking points as if it was a viable alternative to evolution.
I wrote my PhD thesis about bacterial flagella. Not about the motor though (which is incredible), but about the long part of the flagella that is extracellular. It is able to change its shape as the bacteria moves. The mechanism by which this happens is at the same time quite simple, but just about impossible to explain via text. Really, really neat bit of evolution that has proven to be home to incredibly rich physics that is still being studied to this day.