The specific file name "@LS_MOVIES Thunivu_2023_Tamil_Proper_HQ_PreDVDRip_x264_AAC.mkv" refers to a pirated version of the movie , likely shared via Telegram channels such as @LS_MOVIES.
These are the video and audio codecs used to compress the file into the .mkv format.
Indicates the source was likely a recording or early digital leak before the official DVD or high-definition Blu-ray was released.