Register your account before uploading files.
To register a YouTube account
1) Click [Settings] on the menu bar, and click [Share].
The [Share] dialog box appears.
2) Click , and click [YouTube Uploader].
Follow the on-screen instructions to configure the setting. When the setting completes, [YouTube Uploader] appears in [Account] of the [Share] dialog box.
Click [×] on the upper right of the [Share] dialog box to close the [Share] dialog box.