Sorry I didn't see your response earlier. I took another look at the video, and I finally got it (it took me a little while though). Not strumming those extra 16th notes doesn't sound too different, but once I got it down, it felt more natural anyway. Rhythm isn't one of my strong suits, but that's because I hardly spend any time on it lol. I've been spending the majority of my time building up speed and sweep picking ability.
But every once in a while I try to learn a song out of my usual comfort zone. I wouldn't want to end up being an incomplete guitarist!
Thanks for the advice.
~Rusty