It is open-source and highly flexible, supporting high-quality features like multiple audio languages and chapter points, which is why it is often used for high-definition movies and TV shows. Common Issues with Telegram MKVs
The extension indicates a Matroska Video file. It is not a video codec itself but a "multimedia container" that can bundle an unlimited number of video, audio, picture, and subtitle tracks into a single file. AgAD0gADBUChVw.mkv
Telegram often displays MKVs as "files" rather than playable "videos" in the chat interface because they may use codecs (like DTS audio) that the app's built-in player cannot decode. It is open-source and highly flexible