Controlling Throttle and rpm

Good Day, I observed in this video that at multiple times you were at 100% open throttle however your rpm was very low. I would like some clarification on this please. I would think the rpm would be way higher at wide open throttle regardless of what gear you're in. Thanks

That is done using a load-controlled dyno. With those, you can set the Engine Speeed you wish to hold, and once you have the minimum throttle to achieve that, you can open the throttle further without the RPMs increasing. A Load Controlled Dyno is really a required tool for tuning a complete fuel and ignition map from scratch on a stand-alone ECU.