YouTube has a feature called a Channel Ad (formerly known as the "Fan Finder" video) that is a great feature every channel should use. This allows you to choose one video on your channel to be eligible for free promotion on YouTube.You know those skippable pre-roll commercials on YouTube that allow you to click "Skip Ad" after 5 seconds? When you select a video for your Channel Ad, there’s a good chance that YouTube will run your selected video as a skippable ad before other popular videos that are similar to yours. This is basically like YouTube giving one of your best videos a free advertising campaign.
There's no guarantee that your video will be selected, but it costs you nothing and takes just a few seconds to set up, so we highly recommend you go pick one of your catchiest and highest quality videos to select as your Channel Ad.
To enable your Channel Ad:Log into your YouTube account, here, and click the blue "Select your channel ad" button in the Featured Content section.