I see several things that look great in your open water attempt. First off, congrats on getting Outside The Box and pushing yourself! Way to go! In the video I saw a nice relaxed forearm coming forward and not splashing the water but going in on its own momentum. It looked like your fingers were spread apart which meant you weren't tense. Your elbow as high and didn't seem to pinch your shoulders, and - although it can't be seen because we're looking at it from above the water - you seem to be rotating just enough just like Terry instructs.
The one problem I see is hand entry. It seems it might be extended a little, not a lot to get a bit more him drive. This could be due to the fact that your wife was shooting from a farther distance, but that's what it looked like too me in the video. Other than that, what I see is two solid years of drills paying off on a man who loves to swim!
Keep up the good work!