Longplay

A longplay is a play-through of a video game, created with the intent of completing it as fully as possible, mainly for the purposes of nostalgia, preservation, and possibly as a walkthrough. Also, for people unable or unwilling to play a certain game, yet wish to know and experience its story, a longplay can be viewed simply as a long digitally animated movie. Unlike speedruns, there is no time constraint aside from those imposed by bandwidth/filesize concerns.