- In Final Cut Pro X choose File > Preferences.
- Click the Destinations button at the top of the window
- Select Add Destination in the Destinations list on the left.
- Drag the YouTube destination from the area on the right to the Destinations list on the left.
- Enter your YouTube account information and click OK.
- Double-click the name of the new destination you created in the list on the left and rename the destination "YouTube 4K".
- Modify the settings of the destination on the right by choosing "4K (4096 x 2304)" from the Resolution pop-up menu.
- Close the Destinations pane.
Final Cut Pro X 10.1: Adding a destination to Share 4K to YouTube
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