OK read most of it.
First you are way upside down on the video surveillance thing.
Videotape all you want. but if you record sound you are in violation of FED wiretapping laws.
Stop now.
Don't post that you have again. edit it if you can.
If you want a more detailed explanation I can give one.
On to the original problem.
Move.
I am not joking. you are sitting up nights worrying what a drunk might do. I can tell you from many encounters that drunks don't know what they are going to do till they are doing it and sometimes not even then.
You health is bad, worrying about some one with no self control is not going to help you.
you can try to increase your security, cameras,lights, a dog, start a neighborhood watch.But in the end it sounds like you will still be worrying.
You don't have to explain to me why you did not fight the guy. why go through the trouble of the fight, possible arrest, med treatment,bills court appearances,and lawyer bills a over a drunk? when it is all over he will still be a drunk and you will still live across the street.
Some of these neighbor disputes go on for years or generations. I have seen families go broke fighting in court over this kind of thing. I have seen people end up dead over them.
I realize none of what I said is very helpful or hopeful. truth is you are going to be having this problem until
1 He quits drinking
2 one of you moves
3 he gets locked up, killed in a wreck, dies,
Good luck
NOI 17 years LEO