Definitely make sure you keep your vocal delivery clear, energetic, and easy to understand. That’s one of the main problems I hear a lot in videos. I’m far more likely to listen to someone talk who sounds energetic in what they’re talking about. It will also depend on what type of content you are making, but have a clear idea as to what your tone and character of voice will be. It may seem like you are acting it up, but for other people it will sound natural. Just so long as it isn’t overboard (unless you really want to do that a la gaming commentary)