This is a tool-assisted speedrun. For more information, see http://tasvideos.org/2727M.html
Classic Kong Complete is a homebrew remake of Donkey Kong with updated graphics and sound. Unlike the NES port (http://tasvideos.org/1352M.html) , Classic Kong includes all four levels from the original arcade game.
In this movie, Fortranm runs through one round, showing off the entirety of the game and beating it in just over two minutes.