If someone clicks a TrueView in-display ad, where do they land?
The ad’s destination URL
The advertiser’s YouTube masthead
The video on the YouTube watch page or advertiser’s channel
The advertiser’s website
Explanation:
Clicking the ad will deliver a user to the YouTube watch or channel page to view the video rather than playing the video within the ad unit itself.
Read more here: https://support.google.com/displayspecs/answer/6227733?hl=en
https://www.youtube.com/watch?v=94TyKMgNUY4