i don't use them as well. Thats a very poor CTR there for video units. People don't click the video after they see it because they don't know they can.
I don't get many clicks on my video units, but they're my top performer on a per click basis, averaging more than $0.50 per click compared to an average of $0.03 per click on my text ads.
Well, certainly you realize that when you show clicks and impressions... it doesn't take much to calculate CTR? I'll edit my post then... but it really doesn't stop people from calculating that...