It is crucial to distinguish this from a theatrical film. S01 immediately follows, confirming this is a release.
Because it is a WEB-DL, the MKV container likely includes embedded subtitles (SRT or PGS) in multiple languages (English, French, possibly German or Spanish) and proper chapter markers. Rematch.S01.WEB-DL.720p.x264.EAC3-BULTOR