How is that video closed loop?
Yes I know it's closed loop inside the servo, but the video title indicated to me that there is some means of checking externally that the servo actually got to where it was supposed to be.
If it doesn't check, then to me that's not closed-loop as far as the whole system is concerned.... you're still sending the servo a setpoint without testing to see if your setpoint is met. But maybe there's more to it than just that 1 minute video.