: The resolution of the video, which is 640x360 pixels, a standard "Standard Definition" (SD) format often used for mobile compatibility.
: The container format (MPEG-4 Part 14) used to hold the AV1 video stream and associated audio. Context in Digital Media IMGA0054 Av1 360p mp4
While no single "full piece" exists for this specific combination, the string describes a technical test case or a specific media file used in video compression research: : The resolution of the video, which is