The quality of video in an MKV file doesn’t depend on the format itself, but rather on the codecs used within the file. MKV is a container format, which means it can hold various types of encoded video, audio, and subtitles. The actual quality of an MKV file is determined by the codec used to compress the video and audio streams, not the MKV container.
For instance, an MKV file using the H.264 codec will likely have the same video quality as an MP4 file using the same codec, assuming all other settings (bitrate, resolution, etc.) are identical.
In short, MKV doesn’t inherently provide better quality than other formats like MOV or MP4. The quality relies on the chosen codec and compression settings within the file, not the MKV container itself.