His models are fantastic but i dont know how to migrate them to my projects. I find his models to be very useful to put them in the house i design. This would save me a lot of time.
Follow this video (should work the same) -> migration tool:
right click on the mesh that you want - migrate - choose your new project content folder - ok -> open the project and everything should be in there 
Yeah but i cant open it in UE4Editor…
Ah, yep you can use the content, because he has packaged everything -> so there is no way that you get the assets 