I don't know EXACTLY how much you can take away from this video, but since it's Henne's only NFL action I'd like to do a little analysis.
First of all, without getting too in depth, the first thing that you notice from Henne is his arm strength. The guy has a slingshot release and the ball has such great velocity out of his hands. I'm not making any comparison here obviously, but when Henne throws the ball he looks like Peyton Manning.
Now let's go throw by throw.
Throw #1: Nice read, check down to the open tight end, Martin drops the ball underneath.
#2: Wow. Beautiful zip pass on a skinny post to Derek Hagan in between 3 defenders. Awesome pass, there appeared to be smoke coming off the back of that ball. (Btw Hagan is tearing it up in Giants training camp haha)
#3: Good completion on a curl to Bess. Once again, the ball had great zip on it and that was necessary because defenders were nearby. A man with a lesser arm doesn't complete that pass.
#4: Complete out to the right flat to Ricky Wiliams for no gain. Henne had more time that he thought on this play and he should have stepped up in the pocket to look for an open receiver. Ricky was hit as soon as he made the grab. Regardless, it's a completion.
#5: Henne shows great pocket presence as he stands tall with poise while he let the play develop. He hit Hagan on the right sideline with a beautiful pass on a comeback route. 1st down, very nice. Again, there was tight coverage and a nice throw was made.
#6: Had all day to throw and checked it down to Ronnie over the middle for a gain of a few.
#7: Little underneath screen type play to Ginn who scrambles up the field for about 9 yards.
(offsides, Henne gets destroyed and stands right back up. Good to see)
#8: Fake end around and Henne had to get rid of the ball too early with pressure in his face. Incomplete to Bess in the left flat.
#9: Great toss on 4th and 5 on a laser deep out pass to Camarillo. Pass is good for about 15 yards, impressive zip.
Eh, I missed a throw somewhere and I don't feel like doing this anymore. But after this, Henne should have had his first NFL TD pass but Ronnie dropped an easy TD pass in the end zone. Personally, I'm very impressed and hopeful going forward.