Hi,

Please do follow steps below:

1/ Make sure your posts is video post format - check this image

2/ Go to Customize > Single Posts > General > Single Posts Template > select "Style 10"

3/ Go to Customize > Single Posts >  General > on "Add Google Adsense/Custom HTML code For Post Template Style 10" put the code like that to create a banner like on our demos:

<a href="YOUR_URL"><img src="YOUR_IMAGE_URL" alt="banner"></a>

Note:

a/ Change the "YOUR_URL" on the above code to the URL you want to go when users click on banner image.

b/ Change "YOUR_IMAGE_URL" on the above code to the banner image URL - check this guide to know how to get URL of the image you've uploaded.

Best Regards,

PenciDesign