AAC is the audio format (Advanced Audio Coding), which provides clear sound. .mkv (Matroska) is the "container" file that holds the video, multiple audio tracks, and potential subtitles together. Summary of Viewing Experience
This is the video compression codec used. It is the industry standard for balancing decent visual quality with a small, manageable file size. AAC is the audio format (Advanced Audio Coding),
This file is designed for users who want to save storage space or have limited data. Because it is , the file size is likely very small (usually between 300MB and 500MB). It is a "budget-friendly" version of the film—you get the convenience of multiple languages and a reliable video format, but you sacrifice the crispness of High Definition (720p or 1080p). multiple audio tracks