Nicely put together, the bits of game match the words nicely. My only feedback? Audacity.
Basically, this was clearly all recorded in one take. When you stumble ('um' 'er' '*stop* *restart*') the video retains the stumble. A nice, free, easy to use audio editor like Audacity would let you trim those out, pause if you didn't like a certain bit and just do that bit again without having to go again from the start, etc. It's a nice easy way to get a more 'professional' result.