Git LFS Documentation
Reference Manual
Each Git LFS subcommand is documented in the official man pages. Any of these can be viewed from the command also:
$ git lfs help <command>
$ git lfs <command> -h
Videos
- How to Work with Big Files - Quick intro to Git LFS.
Developer Docs
Details of how the Git LFS client works are in the official specification. There is also an API specification that describes how the server works.