From what I observed, I see a lot of things that can be improved on. I noticed first of all how low he kept his hands when fighting, they were at mid-chest range. Now I know this is a tactic used by experienced fighters to draw an opponent in, but for a beginner fighter, he NEEDS to keep his hand up in front of his face in a classic boxing guard:

http://pthumbnails.5min.com/30/1480_2.jpg

Especially in amateur boxing, the hands need to be up because most amateur boxers throw ONLY head shots, no body shots. So you can expect an opponent to try and tee off on his head, so he needs to keep his hands up if he wants to avoid getting knocked down.

Secondly, he was pawing a lot, as YoungBlood mentioned. He didn't really commit to his punches, and he was throwing them at half speed, which is why he got knocked down with that Cross at the beginning of that one round. He needs to throw his punches with excellent technique and speed, "pawing" will allow his opponent to counter him, which could lead to a knockout. I would suggest working with him to perfect the technique of his punches, to increase speed and power through technique.

Thirdly, he needs to throw in combinations, one punch will not do it. He needs to let the hands go. I know he was nervous, but the number one thing you have to know about amateur boxing is that you have to throw punches in bulk, meaning the opponent who punches the most will usually win an amateur fight, unless he gets knocked out by a counter shot.

I would stress working easy combinations that work, like:

Jab, Cross

Jab, Jab

Jab, Cross, Left Hook, Cross

Cross, Left Head Hook, Cross

Don't worry so much about getting countered, go in there and throw fast and quickly and move out of range.

Well there you go. I used to be a boxing trainer, so I've seen my fair share of amateur boxing matches. Hope this helped you out, good luck with your fighter