What can be done about a video camera pointed at my house?:
If he is unhappy about your dogs. Then that's where your problem is. Either you find a good home for the dogs or train your dogs or move out to a house to keep neighbourly peace. But its really up to you. Most likely he is gathering evidence that your dog is indeed behaving badly or out of control. If your dogs are really doing something that is damaging or noisey then it would be a good idea to train the dogs. 

I've lived in an apartment and co-operation and sensitivity and tolerlance is sometimes not easy. But such is the life of living in a apartment. Two wrongs doesn't make a right. How many options do you have? You can't evict the guy. More complains to the authorities is not going to get you anywhere.