Yes, now my memory has been jogged a bit, Tomb Kings were mentioned in video as having detachments too.
Also, I generally found the video to be interesting, although a bit long. However, there seems to eb a lot to cover, and it gave me the impression, even before their concluding comments, that the rule system is going to be a bit complex. At least in the beginning when folks are learning it.
Seems they've based these rules off a 6th edition styling, except with making adjustments and adding a bunch of items to it.