How to create our own custom keyboard shortcut keys for Ubuntu?

Video shows how to create our own custom keyboard shortcut keys for ubuntu systems. [Shown in Ubuntu 20.04]

Thankyou
gp_sec

[pythonteller]

Lastly I found a well made tutorial on creating shortcut 😌

[jonathankr]

I'm disabled and want to turn on and off the 'click assist' in universal access within settings. Do you know what the command would be to write so i can open the universal settings? I want to be able to turn off and on "click assist"