: The "mmsub" portion might refer to a specific group that provides translated subtitles.
: These represent the technical specifications and release year—specifically a 720p resolution video in .m4v or .mp4 format released or uploaded in 2021 . Guide to Accessing and Understanding the Content xxxmmsubcom tme xxxmmsub1 ipx982720m4v 2021
Widely Viewed Content Report, Third Quarter 2021 - About Meta : The "mmsub" portion might refer to a
Since .M4V was historically used for music videos on iTunes, the asset could be a music file. 2021 was defined by: xxxmmsubcom tme xxxmmsub1 ipx982720m4v 2021