: This refers to the video codec used to compress the movie. x264 is a widely used standard that balances high video quality with small file sizes. It’s what allows a massive Blu-ray file to be shrunk down without looking like a blurry mess.
The string "wwwtamilrockersnet bdrip x264 500mb" is a specific file-naming convention commonly used on the internet to identify pirated movie files. This particular name refers to a movie file hosted by the notorious piracy group Tamilrockers wwwtamilrockersnet bdrip x264 500mb