I'm a big fan of Chris Sherlock's camera repair videos on YouTube https://www.youtube.com/c/ChrisSherlock/videos
He goes into great detail with shutter disassembly and re-assembly, but it always remained a mystery how the darned things actually worked.
I was searching to find a description of the actual shutter functioning, to better help me understand what the different components are actually doing.
The video above is short, but sweet, and answered so many of my questions. The voice is clearly that of Chris Sherlock, but that YouTube channel predates the current Chris Sherlock channel, and has a different name.
I couldn't find that video on Chris's current channel, so I've posted it here for reference.
Since viewing that, and getting a better understanding, I've been able to take apart a couple of Rolleiflex shutters, and some large format lens shutters to fix various problems. That short video was the key.
