Hey man, don't post much here but I stopped in to say I thought you did really well. Some things I observed which might help you in the future (sorry if I'm restating what others have mentioned):
-I noticed that in the first half of the first round, you turned the tide in your favor very quickly by winning the war of jabs. Your timing was better, and you eventually set up your offense behind a jab very well, which your opponent had no answer to. A great tool I think you could add to your arsenal would be the basic slip/counter; slip outside the opponent's jab, and come back with a quick straight right. After throwing many single jabs, that's what your opponent expects and tries to counter with his own jab. I think it would have been great to feint, slip to the side, and come back hard. But again, you did well with the jab.
-Try moving your upper body a bit more to avoid being predictable. Also, if you step at an angle while throwing before moving in, it becomes much harder to time you coming straight in. Both of those things will make you more fluid and open up opportunities for you offensively while reducing your body/head area as a target.
-Good bodywork to score points and do damage while his guard was up; I'd try to shorten them up a bit and try for short pivots rather than looping shots. Also, don't overextend yourself. You're not a short fighter, and while that doesn't mean at all you shouldn't hammer to the body when you can, it favors you to be in short when going to the body, or at range; the inbetween leaning forward is where a fighter can get caught by a wild counter from a panicking opponent.
-You had no trouble at all timing your right hand flush on his face as he stepped forward. That's a great asset, I liked that.
-Jabs to the body were good. A little more conviction would be good, but you scored well touching his abdomen and maintained range when doing so.
-Allow me to suggest a few more combinations. As I said before, you did well with the single jabs in terms of timing, but they become predictable and your opponent can score with their own jab. Throw the double jab, perhaps with a right hand behind it (I'm sure you practice this a lot on the mitts, but that's one thing, it's harder in the ring.) After you land the right successfully, I'd try coming downstairs with a short pivoted left hook, and back up with another straight right hand. Body-head-body-head is a good combination rhythm. As a tall fighter, I like to mix up a jab and right to the body, a jab to the body and right to the head, or a feint with a right hand to the body followed by left hooks up top. Like I said, getting no pause on combos is easy on the bag and harder in real life, but the effects are very rewarding once you manage to get it right and apply it with an opponent.
You're more experienced than me in terms of actual competition, and it shows in your composure and disciplined form. Hope I could offer you something useful from an outside perspective. Good luck man!
(PS: How'd you get that footage to come out so clear on the 2nd angle?)