I think your videos are great! Visual, audio, and situational cues all make for effective learning. One request: When I last visited China, a main challenge was to read store signs and train timetables. Would you consider making a video, say, about a person walking down a street and looking for common things like post office, bank, China mobile, food stores...?
Keep up the good work. Over the past year or so, I have seen the program mature into a very valuable resource ad a very reasonable price.