Based on your query, you are likely looking for the "Eizou Hakusho" (映像白書 - "Image/Vision White Paper") OVA series, specifically an MKV DVDrip release from 2021 (when a fan or official remaster/upscale likely appeared).
The query "mkv dvdrip 2021" refers to digital backups of the official physical releases. yu yu hakusho eizou hakusho ova mkv dvdrip 2021
4. What "2021" means for this file
The collection is known for its blend of recap footage and unique character insights: Clip Shows & Battle Highlights Based on your query, you are likely looking
Anniversary Blu-rays: Two completely new story episodes, Two Shots and All or Nothing, were released in 2018 for the 25th anniversary. These were bundled with older material in high-definition complete sets that began appearing in digital formats around 2021. Based on your query