The.notebook.2004.pl.720p.brrip.xvid.ac3-dustnwind -

The audio format, also known as Dolby Digital , which supports up to 5.1 surround sound.

This naming convention follows standard "Scene" tagging rules used for digital video files: The.Notebook.2004.PL.720p.BRRip.XviD.AC3-DustnWind

The video resolution (1280 x 720 pixels), which is considered high-definition (HD). The audio format, also known as Dolby Digital

A "Blu-ray Rip" meaning the source for this file was a previous Blu-ray encode (likely a BDRip), rather than the original disc itself. The audio format

The movie title and its original theatrical release year.

The video codec used to compress the movie. XviD is an older format that allows for small file sizes while maintaining decent quality.