Which multimedia aid provides the best support for this

a brief video clip of a medical school professor discussing a specific case of using virtual reality

Explanation:

The short video clip is the best way of representing something as it narrows the story to a short and important scenario. Also, visualization is very important and in the video that is possible.

People connect visual impression with something that happened and that is how they understand it better. The video clip not only speaks, it also shows a lot.