This video is dated. It was taken on May 29th. His face works a lot more now. He smiles and flails around constantly in the tub now, too. It is amazing to see how he has changed. I ran across this today and was blown away by what a difference a couple of months makes.
There is some sort of startle reflex (that he has since out-grown) that makes a baby react like this if you blow a puff of air into his face...
Yes, we had a lot of time on our hands to find this little trick.