I believe it will be just fine.

Yes it does.

the focus chip does not work with video, only photography.

This adapter offers no electrical or mechanical connections between the camera and the lens. You will need to adjust the lens aperture manually. The camera cannot do it for you.

Yes, it will. You will lose autofocus though.

As the FotodioX Pro Lens Mount Adapter for Nikon F Lens to Canon EF-Mount Camera is a fully manual adapter, there is no electronic communication between the Nikon F-mount lens when mounted to the Canon EF lens mount. If your lens does not have an aperture ring, then neither you nor the camera will be able to adjust the aperture setting on your lens. If that is the case, I would instead recommend for you to purchase the FotodioX Pro Lens Mount Adapter with Generation v10 Focus Confirmation Chip for Nikon F-Mount, G-Type Lens to Canon EF or EF-S Mount Camera, B&H # FONIKGEPFC10, which adapter has a built-in aperture ring to allow you to manually adjust the aperture using the dial on the adapter ring. https://bhpho.to/3XelM5E

If you have the EF mount Black Magic 4K camera, then you could use the Nikon F Pro Lens Adapter for Canon EF-Mount Cameras to mount Nikon F-mount lenses onto your camera.

No, the FotodioX Pro Lens Mount Adapter for Nikon F Lens to Canon EF-Mount Camera provides no communication to any lens. Using a Nikon G mount adapter with aperture control will allow for aperture control of an electronically controlled aperture lens.