If you want the best 1080p MKV quality today, subscribe to Amazon Prime or Netflix, use a high-speed internet connection, and download their offline files. They may not be called ".MKV," but the visual fidelity will surpass any unstable torrent you find online.
Stay tuned for Friday releases, and always check the resolution and file size before you hit download. Disclaimer: This article is for educational purposes regarding file formats and resolutions. We do not endorse or promote piracy. Always stream or download content from legal, licensed distributors.
However, the landscape has changed. With OTT platforms releasing movies in 4K HDR within 8 weeks of theatrical release, the need to risk piracy is shrinking. Support the industry that entertains you.