: This is likely the name of the organization or course. It may stand for a Vietnamese entity (as indicated by the word "Phần"). 2022 : The year the content was created or recorded.
The filename contains several clues that help narrow down what the video is about: Weibtm 2022 Phбє§n 01-lg.mp4
: The gold standard for playing almost any file type without needing extra codecs. IINA : A modern, sleek player for macOS users. : This is likely the name of the organization or course