Coming from different 3d software and then trying to do 3d in hitfilm, imho the 3d navigation in hitfilm is not good and not intuitive.
Why is there a need to use ctrl+rmb to orbit, rmb to pan? Why the change from standards?
Its so common in 3d appz to use alt+lmb to orbit, alt+rmb to zoom, mmb to pan or shift+alt+lmb to pan for macs that don't have mmb.
In windows its common to use alt for most navigation combos. Is there a conflict with other functions in hf for alt?
Another issue is the orbit in hf is based on the mouse pointer. Its a good option but for most cases its one of the reason why an area or object in focus gets out of focus in the viewport because you click on an infinite empty space to orbit around and your objects gets out of viewport. The user constantly has to pan to put the object on the center of the viewport again.
The orbit should be circling around close to the object. Just try 3dcoat, lightwave, modo orbit.