X1 synth rack

I'd have to check out the videos but it's possible the browser is docked in the Multidock  - this puts the synth rack into horizontal position and allows for the use of the assignable controls. These in turn are also not enabled by default, but are revealed by the use of the two buttons at the bottom right of each synth in the rack. One button to show the bar where the controls live, the other to assign them, which is how you get them to appear. It's a bit convoluted but functional - you have to click on the assign button, then open the synth's main control window and click on the controls you want to assign to the in-rack controllers, then click again to un-select the assign button, and it will display dedicated knobs for whatever controllers you touched. It remembers them for next time, so you only need to do this once per synth. 

Of course, since I didn't bother to check the video, it's possible that that's not what you were talking about at all... but maybe it helps you anyway?