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

The string refers to a specific digital release of James Cameron's 2009 film Avatar . Each part of this label provides technical details about the video file:

The title and original release year of the film. 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 The string refers to a specific digital release