How to save a processed video file?

Hi,

I need your help! The following last line displays a video in a specific location of my GUI written in Matlab.

VD(frame,sub2ind([a b],r,c)) = video_output_function_details;

I can display "VD" on my GUI and play it as a video file (but only in my GUI). How can I save "VD" as a Video file (that can be exported)?