MP4 typically uses the H.264 (AVC) or H.265 (HEVC) codecs for video and AAC for audio.
You may see files with extensions like .m4a (audio only) or .m4v (often used by Apple for video with DRM protection), both of which are based on the same Part 14 standard. 19448mp4
MP4 is the file format (the container), whereas MPEG-4 is the broad standard that includes various compression methods. MP4 typically uses the H