How Does Final Cut Pro Identify Matching Clips?

Internally, each master clip in a project has a unique number called a universally unique identifier (UUID). No two clips in a project can have the same UUID. When you drag or paste a clip from one project to another, the destination project may already contain a clip with the same UUID as the source project clip. When the source and destination clips have matching UUIDs, Final Cut Pro detects a match. When both clips’ properties match, the clips match exactly. When the source and destination clips have one or more nonmatching properties, you must choose how to resolve the differences.