Filming video using manual focus provides the best result in my opinion. Video auto-focus has improved throughout the years but using manual focus is the best solution that I've found for eliminating "focus breathing" and creating the
This is how to understand manual focus for video. By utilizing manual focus, the "professional look" can be achieved with video. Defocused background, also commonly referred to as "bokeh," is just one of the many advantages of using manual focus for video.