In order to run ads via YouTube, you need a YouTube channel that you’re happy to use. If you don’t already have one, create one first using Google’s instructions.
Navigate to Settings > Integrations.
Find ‘YouTube’ in the list and click ‘Connect your YouTube channel
You will see a disclaimer appear with Google’s API Services User Data Policy. Click Continue to proceed.
You will be prompted to sign in to the Google Account associated with the relevant YouTube channel
Review and allow the permissions; click Continue.
You will see a pop-up with Partners and Advertisers. From here, select the advertiser you want to export ads to, and click Save.
The account will now show as ‘Connected’.