High quality, but usually more compressed for smaller sizes. Yes, free and community-driven. No, proprietary (though widely standardized). Are you trying to fix this file so it plays correctly, or MKV vs MP4 -Which Video Format is Better?
Sometimes, automated scripts leave the original extension in the name to keep track of the source file, resulting in the .mkv.mp4 naming convention. Technical Comparison: MKV vs. MP4 (.mkv) MP4 (.mp4) Best For What The F!!!.mkv.mp4
Archiving, high-quality movies, multiple audio/subtitle tracks. Streaming, sharing, and mobile device compatibility. Typically lossless; supports almost any codec. High quality, but usually more compressed for smaller sizes
In video editing and recording communities (like those using OBS Studio ), creators often record in because it is "crash-proof"—if your computer dies, the recording is saved up to that moment. Are you trying to fix this file so
Creators then "remux" (wrap) that MKV data into an container for easier editing in software like Adobe Premiere or DaVinci Resolve.