One of the sub-collections of the Internet Archive's Video Archive is the Machinima Archive. This small section hosts many Machinima videos (see Machinima: Virtual Filmmaking). Machinima is a digital artform in which computer games, game engines or software engine are used in a sandbox mode like mode to create motion pictures, recreate plays or even publish presentations/keynotes. The archive collects a range of Machinima films from internet publishers such as Rooster Teeth (Rooster Teeth Productions) and Machinima.com as well as independent producers. The sub collection is a collaborative effort between the Internet Archive, the How They Got Game research project at Stanford University, the Academy of Machinima Arts and Sciences and Machinima.com.