That was a really great video. Excellent technique. The contrast between the concise questions and the answers was very illuminating.
It's a shame you weren't able to delve a little more in some places, as I think the answer to the most important question got lost somehow.
"Can you talk about...
Sound is clear enough, although it gets out of sync a few minutes from the end and after that lipreading and listening gets a little harder. :)
Any chance you could repost a corrected version before too many people link it (or put a link on this to the fixed one)?