You can submit your entry to the 2013 Saxxy Awards by opening Source Filmmaker and navigating to "File > Community > Submit Video to Saxxy Awards".
Enter your YouTube account username and password on the login screen. If you're using Google's 2-Step authentication you'll need to setup an application specific password via your Google account settings before you'll be able to continue.
Once you're logged in you'll then need to complete the required fields. Give your video a title and a description, and select the file name and content type. You'll also need to specify the category of your entry. You can find the guidelines for each category on the Source Filmmaker website[sourcefilmmaker.com].
When you're done filling out all of the fields click on the Submit button.
When your video is done uploading you'll receive a notification. If you had the "Open in browser after upload" box checked the Steam Community page for your Saxxy entry will open in a new browser window.
Your video page is where you can direct people to once voting starts on the 18th of November.
If your video was a joint effort you can add a co-author by selecting the Add/Remove Contributor link within the owner controls section.
Adding somebody as a contributor will display their name in the "created by" section. Before their name will be displayed they will need to accept the request sent to them through email. All co-authors need to accept the request before the submission deadline.