To enter we recommend making your audition video unlisted. You can choose to make any of your uploads an unlisted video in your YouTube account settings. Here’s how:
Sign into your YouTube account
Go to your My Videos page
Select the video which you’d like to make an unlisted video. Click the Edit button to access the video’s settings.
Go to the Privacy section of the page. There you’ll see the option to mark you video as “unlisted”, “public”, or “private”. Select unlisted.
Don’t forget to click the Save Changes button. Once you’ve done this your video will be an unlisted video.