Including subtitles (Timed Text), still images, and complex metadata. Bitrates and File Identifiers
In professional cinematography, numbers associated with the "mp4" extension often indicate the quality of the capture. For instance, many high-definition cameras use a setting for recording in MP4 format, which strikes a balance between professional-grade visual fidelity and manageable file sizes. 285mp4
Often using Advanced Audio Coding (AAC) for high-quality sound at low bitrates. Including subtitles (Timed Text), still images, and complex