
1) Cinematography technique
Found on
https://www.crosswordclues.com/clue/video-assist

Video assist (VA) is a system used in filmmaking which allows filmmakers to view a video version of a take immediately after it is filmed. Originally a small device, called the video tap, was installed inside a movie camera that allows (with the addition of a monitor) the director to see approximately the same view as the camera operator, and thus...
Found on
http://en.wikipedia.org/wiki/Video_assist

The process of simultaneously recording filmed picture onto video tape by means of the same lens system in order to immediately evaluate a take as soon as it is completed. (Production)
Found on
http://www.filmland.com/glossary/Dictionary.html#A
No exact match found.