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
Short for "Blu-ray Rip," meaning the file was encoded from a retail Blu-ray disc source. subtitle Avatar.ECE.2009.720p.BrRip.x264.bitlok...
Because this is the , standard subtitles for the original theatrical version will not work. They will quickly fall out of sync because the ECE version is approximately 178 minutes long, whereas the theatrical version is only 162 minutes. This is likely a "release tag" or the
The video resolution (1280 x 720 pixels), which is standard high-definition. subtitle Avatar.ECE.2009.720p.BrRip.x264.bitlok...
The video compression codec used to keep the file size manageable while maintaining quality.