To help you earn more money on YouTube, we’re going to be making some changes based on these default settings.
You can already easily set your ad format preferences consistently across all your new uploads. On Nov. 9, 2012, we will automatically enable ad format settings on your older monetized content in line with your current default ad settings. This change will only affect monetized videos uploaded before Apr. 20, 2012.
For example, if you have TrueView in-stream ads enabled as a default for your new uploads, we’ll go back and enable it on older monetized content. Conversely, if you don’t have in-video ads on by default for new uploads we won’t touch that setting on any video.
If you do not want to apply this change to your older videos, you can easily opt out. If you use Video Manager, opt out at http://www.youtube.com/my_videos. If you use the Content Management System for your channels, you’ll see a notification when you login with instructions. If you wish to opt out, please do so by Nov. 9, 2012. After that date, the ad settings on all of your older monetized content will change to reflect your current default settings.
This change will give you more opportunities to make money from your videos, so we encourage you to check your default settings for monetization and ad formats at http://www.youtube.com/account_defaults.