Subtitle - Avatar.ece.2009.720p.brrip.x264.bitlok...

This is the definitive "longest" version of the movie. It includes 16 minutes of additional footage not seen in theaters, such as an opening sequence on Earth and a scene involving a massacre at a Na'vi school.

The video resolution (1280 x 720 pixels), which is standard high-definition. subtitle Avatar.ECE.2009.720p.BrRip.x264.bitlok...

This is likely a "release tag" or the username of the individual or group who encoded and uploaded this specific version of the movie. Subtitle Compatibility This is the definitive "longest" version of the movie

The title and original release year of the film. subtitle Avatar.ECE.2009.720p.BrRip.x264.bitlok...

Short for "Blu-ray Rip," meaning the file was encoded from a retail Blu-ray disc source.