VLC Media Player, MPC-HC, or IINA (for Mac).
: The Matroska Video container . MKV is the industry standard for anime because it supports multiple audio tracks, subtitle files (soft-subs), and chapter markers all in one file. Why This Format Exists dstmdns-480p-dual-org-mkv
To play this specific file, you need a media player capable of handling MKV containers and switching audio streams. VLC Media Player, MPC-HC, or IINA (for Mac)
In VLC, you would right-click the video, go to Audio > Audio Track , and select between the two available languages. VLC Media Player