Video is a DSL for describing videos. It is still very much in development and backwards breaking changes are made frequently.
The easiest way to install Video is with raco, which comes bundled with Racket simply run:
raco pkg install video
The master branch for Video is currently unstable. We recommend using the releases page for Video.
The Documentation for Video can be found at: http://docs.racket-lang.org/video/index.html