AdWords remarketing now allows you to reach viewers who interacted with your YouTube videos, helping you strengthen your brand and relationship with your YouTube audience. By showing tailored ads to viewers who chose to interact with your videos or your YouTube channel, you can increase ROI with custom ads unique to YouTube interactions.
To get started, you'll need to link your AdWords and YouTube accounts first, if you have not already. To link your YouTube account to AdWords, choose to create a new online video campaign in your AdWords account.
After you choose this new campaign type, you'll see an option to link your YouTube account to AdWords. You'll need to enter your YouTube credentials using the e-mail address and password on the account that owns your YouTube channel.
Once you sign in, you'll be automatically redirected to AdWords, and you should see your channel linked to your AdWords account.