Out of curiosity and because that video does not play properly through the browser when opening the dropbox page, which in my experience and the way the video played proved to me the source video is corrupted, it had the common faults I've experienced when a screen recording is done on a PC which has problems, commonly video driver or other hardware problems, may not be the case here, but that's the only time I've seen video in this state with the same problem.
I downloaded the video, played it, it played the same way it played in the browser, skipping forward at intervals.
Attempted repair with VodeoRedo v4 ... failed, opened in Handbrake, no video was displayed in the preview meaning the video was unable to be processed.
Contact whoever supplied the video, there's nothing VDH or anyone can do to fix that for you except a new video without faults is supplied.