DivX is a progressive implementation of the MPEG-4 format. It offers a significantly higher degree of video compression (comparing to another H.263 video codecs) and carries a number of revolutionary innovations of that time. To playback DivX files on PC, you can use many different programs because currently most video players support DivX even in FullHD resolution. For viewing such files in modern browsers the company developed DivX Web Player. However, the H.263 standard (which DivX implements) was created in 1996 and is currently considered obsolete. It was replaced by the H.264 and H.265 standards that are implemented in more progressive codecs such as HEVC and AV1.

This is a lossless-format (and encoding algorithm) for Apple platforms. M4A is widely used in iPod players and as a component in QuickTime media-players. The m4a codecs decoder is found in open sources – this allows third party users to open files in that format.