: The source of the video is a high-definition (HD) stream or file that has been re-encoded.
: These are file extensions. The presence of both suggests the file might have been renamed or is an .mp4 file containing an .mkv container, though it is usually just one or the other. : The source of the video is a
How to differentiate between multiple subtitles in the same language : The source of the video is a
: The video compression standard used (H.264), which is common for maintaining quality while reducing file size. : The source of the video is a