First, I am deaf and I have been both a developer and instructor for years. I am very eager to learn how to develop for Windows Phone, but the videos here are not beneficial for me. I need to see captions in these videos as reading lips can only go so far. Please take this into consideration as I would love to benefit from these videos.
Perhaps it would be a good opportunity to use your own translator to create captions for your videos: http://blogs.technet.com/b/next/archive/2012/11/08/microsoft-research-shows-a-promising-new-breakthrough-in-speech-translation-technology.aspx#.UMEkfeEo6Uk