Oh wow, I wasn't expecting people to have a hard time understanding the words. But that's maybe because I'm the one who recorded them, haha. Perhaps once I have some better recording equipment, the higher quality will make it easier to hear.
As far as coughing goes, I've been having trouble thinking of a good replacement. His movements make it hard to be anything else. I was thinking he could be shouting something, but that might be cheesy.
On an entirely different note, here's another video. The first 3:40 of my edit. Sounds still very temporary, and some visuals are incomplete.