Can you post an example how to show the ad smaller than full screen? I've tried the one in this thread and it doesn't resize the video, it just moves it.
Can't you just wrap the video node with a group then use scale on that group to shrink the video node? Set the scale to 0.25 to get 1/4 the size then adjust the translation placement to get where you need to be.
Thanks @speechles, that helps position the ad correctly. Now the video that plays after the ad is moved, but maybe I can figure that out. Strange it seems the ad plays in a different player or something?