He's got a good, non-emotional speaking voice, and his content:noise ratio is high. Also, the tempo of the overview is near perfect, and his choice of what video to show to go with his voiceover is flawless.
Can you please elaborate on what you mean by this?
What makes it good? What makes it non-emotional? What is an example of a bad voice? What is an example of an emotional voice?
I suspect you knew all of this and were simply trying to jump on some point that sounded subjective to you and perhaps it is, but that's what I mean.