: Support for embedded subtitles, still images, and object descriptions as defined by the MPEG-4 Part 14 standard .
: It may simply be the filename of an MP4 video (a common multimedia container format ) stored on a local drive or a private server. Technical Profile of an MP4 Feature 38770mp4
However, based on its components, it likely refers to one of the following: : Support for embedded subtitles, still images, and