264 — Mp4

H.264 is the world's most popular video compression standard, while MP4 is the most common file container used to hold it. Together, they create a highly efficient and compatible video file used for everything from YouTube streaming to high-definition Blu-ray discs. H.264 vs. MP4: The Core Difference

This is the "box" that holds the H.264 video stream, along with audio (typically AAC), subtitles, and metadata. Why They Are Used Together 264 mp4

The combination of H.264 video inside an MP4 container is the industry standard for several reasons: MP4: The Core Difference This is the "box"

Does anyone have strong opinions about using h264 for proxy media? Supported by nearly all streaming protocols like HLS,

This is the "brain" that compresses and decompressess the raw video data to make it small enough for storage and streaming.

Supported by nearly all streaming protocols like HLS, DASH, and RTSP. Practical Quick Facts

Provides high-quality 1080p or 4K video at significantly lower bitrates and smaller file sizes than older standards.