You can open the YouTube upload dialog via one of the following methods:

• From the Share Toolbar button menu. Click the Share drop down button. Select the Upload to YouTube option.
• From the File menu. Select the Upload Converted File item. Select the Upload to YouTube option.
• From the File menu. Select the Upload Original File item. Select the Upload to YouTube option.

Once reaching the YouTube upload dialog, you can choose assorted settings that will be applied to the uploaded video.

After making your selections click on Upload, to begin the conversion (if required) and upload process.

If required the YouTube Authorization dialog will appear. Login to your YouTube Account, and follow the prompts to allow the application to access your online profile.