Currently video overlay ads seem very restricted when using HTML, maybe they are embedded in a SWF container.
"The following HTML tags are supported: <br>, <b>, <font color="#hexadecimalColorOnly" face="" size="">, <i>, <li>, <u>. If you need to display an image in your Overlay Ad, we recommend using the Image Overlay or SWF Overlay instead. All links <a href=""> will be ignored: the flash player will automatically add a click layer on top of the overlay, that will initiate a video or open a page in a new window."
New VPAID 2 enables Javascript functionality, it would be great if I could create full HTML and Javascript ads and paste them into Revive.
The Google IMA SDK for HTML5 has support for VPAID 2 JavaScript creatives, so this could be tested.
Regards
Michael
