The movement where you move the neck and head to the side together, without the head tilting to one side.

I can't move my neck like that. Been thinking about learning how to and searched up for tutorials.
Saw this video that seemed good for people who are absolute beginners, because many others had people aleady moving their necks. Have tried it for 2 days, but neck isolation not yet possible.

Thought about asking here to know how easy/difficult it is and how other learnt it.
If you know any better tutorials or tips on how to learn it, please do share them.

Also, if you learnt it easily/automatically, do you think that it's not possible for everyone?

Thanks in advance