The most generic approach I can think of is a frame grab via VLC media player. If that won't work for you, it may help to provide a few more specs--camera type, video file type, computer OS, etc.
Nice to "see" you again - Mark
Can this be done? If so, how? We set our camera's setting to video and wound up taking a number of short video clips...of our granddaughter's birth. We wanted still shots. We of course can't request a do over.