: A proper MP4 allows for advanced metadata, such as artist name, song title, and album art, which allows media players like MusicBee to organize files effectively.

: The ability to demux (separate) audio from video, edit it (e.g., mastering), and re-sync it perfectly.

: They typically feature the album's cover art as a static image while the audio plays. Essential Editing Features

The most critical "proper feature" for an MP4 music file is its ability to act as a . Unlike an MP3, which only holds audio, a proper MP4 should support the following integrated features: Core Multimedia Features

: Modern MP4 containers are designed for seamless streaming over the internet, which is why they are the preferred format for platforms like YouTube.

: These are created automatically by YouTube when a music distributor uploads your audio.

: Topic videos generally provide the highest audio quality available on the platform because they are generated directly from the original high-fidelity files.

POTOFU