1. Open Final Cut Pro X.
2. Connect the DVD drive to your computer.
3. Insert the DVD into the DVD drive.
4. Click the "Import" button in the top-left corner of the Final Cut Pro X window.
5. In the "Import" dialog box, select the "DVD" option from the "Source" menu.
6. Select the DVD drive from the "Device" menu.
7. Click the "Import" button.
Final Cut Pro X will begin importing the DVD video into the application. The import process may take several minutes, depending on the length of the DVD video.
Once the import process is complete, the DVD video will appear in the "Library" window in Final Cut Pro X. You can then drag and drop the DVD video into the timeline to begin editing it.