It is designed to provide high-quality video at relatively small file sizes, making it the "gold standard" for internet streaming and YouTube.
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 typically uses the H.264 (AVC) or H.265 (HEVC) codecs for video and AAC for audio. It is designed to provide high-quality video at
Разница между MPEG-4, AVC/H.264 и MP4 - Elecard AVC/H.264 и MP4 - Elecard