Not too bad of a review, definitely keep it up. your voice was kind of odd though, felt like you forced a certain tone. just try being yourself, I think it works a lot better.
Just talk to the camera with your normal voice, don't try to do some radio voice or anything like that. Just talk like you would to a person. People appreciate it more, as it looks more honest (at least for me it does).
This kind of thing is there to inform, not entertain. Personally, I rather listen to a guy who sits there and talks to the camera like he would a person, than a guy who talks to the camera like he's doing a tv or radio show.
you describe the mouse features pretty well, but you need to test the mouse and look for sensor glitches like jittering, also test it on multiple surfaces.. etc