The man whose video I’m posting here, Jurgen Ziewe, is new to me, but he seems well informed by way of direct experience with the various realms one can visit (or inhabit) when not restricted by a physical body and its 3D sensory orientation/limitation.
Ziewe draws from a history of OBEs (out of body experiences) to construct his multidimensional model. He gives a good presentation here, using detailed visuals to get his explanations and descriptions across effectively. His website, too, appears to be loaded with information, though I haven’t given it a close look yet.
If the afterlife realms or dimensional planes other that our “primary channel on the dial” are of interest to you, I imagine this man will be as well!
This video on multidimensional realities is about 75 minutes long.