Was Trumps Mic Really "Hot"

So, it strikes me that the video and audio quality of the #TrumpTapes is pretty good. But remember this was 05. No smart phone video, no go-pro. The state of the art compact video looked like this:

The point is, it seems unlikely that Trump was unaware of being filmed. In fact the camera follows him, like in a reality tv show, through 3 different scenes. 

So why was he so knowingly vulgar? 

My guess is that this was character prep for the walk-on cameo role he was playing on this soap opera set. 

So why not just explain it? 

Probably because it's better to apologize first, draw all the fire, then hit back - hard. 

We'll see