Can my WellcomeMat thumbnail be matched on YouTube?

Yes, but you need to unlock the feature within YouTube. Check the 'Custom thumbnails' permission here. If it's not enabled, click the Verify button up top. Once that is complete, your distributed YouTube videos will match your WellcomeMat thumbnails going forward.

Note: images have a 2MB limit. If your thumbnail is above 2MB please resize the image to a smaller size before proceeding.