In the context of the BitTorrent protocol, a refers to a small, fixed-size segment of the total data being shared. Understanding "Pieces" in this Context
: Your client can download these pieces from different people simultaneously and in any order. Once all pieces are collected and verified, they are reassembled into the complete video file. File Metadata Breakdown
The text you've provided, "Animal_Kingdom_US_1x01_WEB-DLMux_Ita_Eng_Ac3_Ba..." , is a standard file name used in BitTorrent swarms for the first episode of the American TV show .
: Each piece has a unique cryptographic hash (digital fingerprint). This allows your torrent client to verify that the data received from another user is correct and uncorrupted.
: The video was sourced from a web streaming service and "muxed" (combined) with other audio or subtitle tracks.