Split Edges doesn't work I found a hard surface modeling technique in the video below (link) but i have no idea how to make it work. Skip to the minute 28:00 of the video.

https://www.youtube.com/watch?v=oJbxu_GLMz0&amp;list=WL&amp;index=4&amp;t=1583s

Please someone know how could this work?
Thanks in advance.
Start with a default cube;



Add a Solidify and Bevel modifier;



Edit the cube, and add an edge loop;



Hit v, then enter;



Edit the Solidify thickness to a desired value;



Edit the cube, and add another loop cut, hit v, then enter;





Add in a bunch more, wherever you like;