This provides a comparison point to the video I uploaded previously, showing a recoil escapement. This type of escapement is designed to 'lock' after the tick or tock, and you'll note that once the spiky escape wheel moves, it remains absolutely solid while the pendulum completes its swing. That's the advantage to this type of clock, the mechanism interferes with the swing of the pendulum as little as possible. This tends to make for better timekeeping, which is why all the better movements used this system.
Also, yes I know my clock needs a clean. :)