Boudimp4

: iPhones, iPads, and Android devices support MP4 playback by default.

: A multimedia container. While it can store audio, it is primarily used for video. Boudimp4

: MP4 files often use AAC (Advanced Audio Coding), which can provide higher audio fidelity than standard MP3s at the same bitrate. Web audio codec guide - Media | MDN : iPhones, iPads, and Android devices support MP4

It is common to confuse these two, but they serve different purposes: : Strictly an audio-only format. Boudimp4

You can extract audio from an MP4 (making it an MP3) or change its video format.