: This usually means the audio was recorded from a theater (which can be noisy) and then digitally edited to remove background noise and echoes.
That string of text is a highly descriptive for a movie download, likely found on a torrent or file-sharing site. It follows a specific naming convention used by "crackers" or "encoders" to tell users exactly what version of the film they are looking at. : This usually means the audio was recorded
: The original language is Tamil, but this specific file has a Hindi audio track added to it. : This usually means the audio was recorded
: These are likely the names of the websites or "release groups" that uploaded or hosted the file. : This usually means the audio was recorded