Action Details
Requirements and how-to articles for YouTube's action:

paid action
Create a video ad sequence campaign for YouTube.

You need this to get it done:

Set up Google Ads account
Create a Google Ads account to be able to create video ad campaigns on YouTube.
Create Video Ad Sequence Campaign
Enter the information for your campaign (name, budget, locations etc) and choose a video to use. Video ad sequence campaigns are different from other video campaigns in that they can only run on YouTube, and is capped at showing 1 entire sequence per user every 30 days.
COPPA Compliance
Note that from January 2020 onwards, personalised ads will not be shown on videos which are aimed at children.
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How-To Articles
A list of useful links for you:

Google Ads Help - Create a Video Ad Sequence Campaign
How to create a video ad sequence campaign.
Google Ads Help - Your Guide to Google Ads
How to get started with and make the most of Google Ads.
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