I don't think it bothers me that much. Hardly noticed it was there. I would still say remove it though since other people might be distracted.
I'm gonna be a semi-harsh critic here since I'm always quick to criticize.
Now this wasn't a bad commentary, but in most other commentaries I've seen, people talk about something interesting while the gameplay is basically some nice background video. I know in a few commentaries people talk a little bit about the actual game when something interesting happens, but I think it works much better if you talk mostly about something else. In addition, it keeps us wanting to watch the video.
I don't need you to tell me what I'm watching, I need to be interested in what I'm watching. Just give us an alert on when something hilarious or cool's about to happen. No need to tell us exactly what we're seeing.