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.
Often using Advanced Audio Coding (AAC) for high-quality sound at low bitrates. 285mp4
processor or specific sports action cameras like the Pyle GDV285 series , which frequently output standard MP4 files. MP4 files explained: How to open and use - Adobe In professional cinematography