Turning radius can be important when comparing different chassis, if you are concerned about maneuvering room. Knowing that you need 32 feet or 37 feet for a "U" turn doesn't help much from the driver's seat. (55 degree or 50 deg. wheel cut)
The answer is to practice in a large parking lot to get a feel for how much room you need and what the motorhome track actually is. Then you may be able to use the cues from the video. I believe they will be different based on the layout of the dash and drivers seat in your particular MH.
Chassis wheelbase (length) also changes the track the vehicle will follow. (you can clip an inside curb with the rear tires).
Another consideration is that overhang behind the rear wheels will make the back of the chassis swing wider than the wheel track, hitting something next to the curb. This is called sweep. Biggest effect here is at low speed when turning out of a fuel station or campsite and the rear overhang hits a post or pole.
This may help to visualize the turn.
Understanding Motorhome Turning Radius vs Wheel Cut Diesel Motorhomes Turning Radius and Wheel Cut
Hope this is what you wanted.....