How to make help microvideos for your website

Doxie scanner uses this to AMAZING effect for the Doxie Go: http://www.getdoxie.com/product/doxie-go/index.html

The huge advantage to using micro-video is that it's much, much lower commitment. Because of this, many more people will watch it and it goes from being part of product help/support to being part of marketing. Very short videos convey a ton of information without making the visitor invest a lot of attention and time.

The only thing I'd caution against is trying to host them yourself. Vimeo, ooyala, brightcove, even youtube all do an awesome job of hosting videos with minimal risk of melting your server.