"28_06_2022" represents the release or upload date, formatted as Day-Month-Year.
The prefix "PureTaboo" typically indicates the production entity or series associated with the media. or subtitle tracks in one file.
.mkv (Matroska Video). This is a flexible, open-standard container format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. or subtitle tracks in one file.