The early DivX releases were mostly internal for group use, but once the codec spread, it became accepted as a standard and quickly became the most widely used format for the scene. With help from associates who either worked for a movie theater, movie production company, or video rental company, groups were supplied with massive amounts of material, and new releases began appearing at a very fast pace. When version 4.0 of DivX was released, the codec went commercial and the need for a free codec, Xvid (then called "XviD", "DivX" backwards), was created.