Install Hevc Codec For Mkv Video On Linux Mint Link !exclusive! Here

To play HEVC (H.265) encoded MKV videos on Linux Mint, the most direct method is to install the Multimedia Codecs

mkdir -p ~/.config/mpv
nano ~/.config/mpv/mpv.conf

sudo apt install ubuntu-restricted-extras -y

The Link: videolan.org/vlc

Troubleshooting: Common HEVC MKV Playback Issues on Linux Mint

Problem 1: "No video output" but audio works

Solution: The HEVC stream is 10-bit or 12-bit color. Install the libde265 decoder: install hevc codec for mkv video on linux mint link