Well, when you learn to really fly you will begin to understand what some of the people here are trying to explain to the author of the video.

Yes, you can just line up with the runway and cut the throttle as soon as you reach the edge of the runway and pray your speed is slow enough that you won't run out of of track.

The right idea is that the throttle determines your altitude and the elevator determines your speed. When you understand that, then you will be able to perfect very smooth landings. The basics is that you use your elevator to adjust the attitude of the plane, which in turn manages how much lift (or lack of) your plane will have. More lift will translate into less speed (throttle being constant). Less lift will translate into more speed (again throttle being constant).

While approaching a runway, beyond simply lining up with it, keeping a relatively level or slightly nose-up attitude and using your throttle to control your altitude, you can either choose to pass over the runway by keeping the plane from "falling" or as you reduce the throttle on your approach (while maintaining attitude/pitch with the elevator), your throttle will determine the rate of the "fall". Instead of correcting your altitude with the elevator, you simply give a bit more or a bit less throttle to maintain the appropriate approach altitle/glide-scope... If you look like you are going to be too short to hit the runway, more throttle will lend way to smoothen out your approach rather than trying to correct your altitude with your elevator surfaces. The same applies on takeoff but it less obvious since you really only need to worry about getting off the ground and generally won't bounce up and down on the runway like you might do while landing.

So when you learn to "really" fly, you will understand that throttle management is a big part of a successful/smooth/jaw dropping landing. The throttle is not an On/Off control.