Good video.
As you Colt and Remington shooters know, after a few shots, the cylinder gets hard to turn because of the fouling that is deposited on the front of the cylinder, in the joint and on the cylinder pin or arbor.
As was mentioned in the video, the Rogers & Spencer revolver design pretty much solved this problem.
With the Colt, Remington, Whitney and Speller & Burr, the front face of the cylinder is flat. This feature allows the blast from the burning powder to blow down directly onto the cylinder pin or arbor. The fouling is not only deposited on the joint but it tends to blow into the joint, gumming up the works.
Colt tried to solve this problem by putting a bunch of grease grooves on the arbor. The other makes relied on the small diameter of the cylinder pin to reduce the effects of the fouling.
Rogers & Spencer took a different tact on solving the problem. Rather than leaving the front face of the cylinder flat, they changed the design to add a short cylindrical area below the chambers that moves the joint between the cylinder and the frame forward about 1/8". With this stepped design, the powder gas doesn't have direct access to the pin or the joint between the cylinder and the frame so, the pistol can be shot many more times than the other brands without the cylinder getting gummed up.
It works. I've shot well over 20 rounds thru my R&S without noticing any cylinder drag at all.