That filename looks like it refers to a specific video file, but "Rizuna" could mean a few different things. To make sure I give you the right info, are you asking about:
(Like what h265 or .mkv mean for video quality and playback). [10-01-22] - Rizuna h265.mkv
(Specifically Rizuna Nanano , often associated with ASMR or music content). A specific anime character or series? That filename looks like it refers to a