Nice points. Can't overstate the value of good lighting - that's they key to making a simple video look professional. All you need is sunlight (if indoors, aim for the brightest time of day, but if outdoors avoid noontime because it creates some awful top-down shadows) and a reflector to bounce the sunlight to the other side of your filmed subject.

Reflectors are cheap ($20+) but sneaky tip is that a big piece of white foamcore is almost as good.

My friend created a tiny wind muff that you can use on DSLRs and some phones. They come in a range of types and sizes. http://www.micromuff.com/. The website has some comparison videos.

Really interested to hear people's feedback.