Well, having a class in your apartment, filming a project.... that might actually have been noisy. Was it 2 or 20 people? What exactly was going on in there during the filming? As for the rest, it's not clear if the complaining tenant has already taken it to management. But it does sound as if she's brought this up several times before to the tenant. It could actually be that this person is noisy and a heavy walker and trying to blow it off saying she has personal issues.
While the tenant was mad that doesn't necessarily put her in the wrong about how she feels about everything and make him in the right. And I don't see anywhere that the poster said he's trying to make sure he's not disturbing her. I would address the reaction with the complaining tenant and try to get documentation on the guy. If it's going on during the day it shouldn't be too difficult.
I had a tenant above me that sounded like an elephant. I began addressing it with him and at no point did he every try to be conscious of those below him. It got so bad I finally terminated his lease. Lo and behold I later learned that everyone who'd live where I was had the same problem. And yes, I asked the same question, why didn't you do something about him.