Final Cut Pro X is the latest version of editing software from Apple, used widely for professional editing. It has a similar interface to iMovie but with more advanced tools. The document discusses why the author edits with FCPX, having mastered iMovie and wanting to learn new skills. FCPX also has fewer limitations than iMovie. While it occasionally crashes, FCPX automatically saves work so it's stress-free. The author finds the software reliable overall despite a vast number of effects being rarely used. Additional plug-ins can provide more relevant content.