: A high-efficiency, royalty-free video coding format developed by the Alliance for Open Media, designed for high-quality internet streaming.
: The resolution of the video, which is 640x360 pixels, a standard "Standard Definition" (SD) format often used for mobile compatibility. IMGA0054 Av1 360p mp4
The search results indicate that is a generic filename commonly assigned by older digital cameras (such as Samsung or Sanyo models) to captured image or video files. : A high-efficiency