it sounds kinda crazy but you know there might be some merit to the idea. you could take picture of the pulloff(s) and see how fast and/or correctly they are working. You could see how fast your choke is opening. maybe and this is a big maybe, with a little bit of smoke added, you could actually see how the air is entering the carb top through the air cleaner! If this could be done, it could show how efficient the factory air cleaners were. That would be tough mounting a small camera in the air cleaner cause you would need a light source of course and it could not interfere with the air. I think it could be done. Mechenics have bore scopes, led lights are small. hmmmmm??? Would make a good youtube video!!
best of all, I dont think anybody has done it,(that I know of).