Because MKV is a container rather than a single codec, it requires a player that can decode its various streams. MKV Files Explained - Adobe

720p (1280x720 pixels), which is considered Standard High Definition (HD).

Matroska is an open-source, royalty-free container that "wraps" multiple data streams—including video, audio, and subtitles—into a single file without altering them. Key Characteristics of MKV Files

Based on the filename structure and standard digital media conventions, this is a high-definition video file utilizing the container format. Technical Profile File Extension: .mkv (Matroska Video).