Adn-263_c.mp4 -

The "C" in the filename usually indicates a specific cut, version, or a segmented part of the full release (e.g., "Cut C"). Technical Context

Most MP4 files from this source use the H.264 (AVC) or H.265 (HEVC) video codec. ADN-263_C.mp4

If you are looking at the "feature" or technical metadata of the file: The "C" in the filename usually indicates a