This workflow allows you to replace shots in the sequence even faster without having to align up matching frames in order to replace media and keep the sync. For example, you matches out a segment in the sequence, performed some VFX work and now you want to replace it back in the sequence. Smart Replace analyses duration and timecode in order to intelligently replace synced media in the sequence. This functionality is not available for Swap Shot between clips. This is designed for replacing media in the sequence.