Ask HN: how do I learn flash?

I want to make a simple video player in flash that can make a 4x4 grid of videos. When you click on a video, it takes over the grid. Also, I'd like there to be buttons that can scroll the video grid left and right. New videos are acquired from a URL and added to the grid when you hit the scroll buttons. After I finish this, there are a number of other flash projects I'd like to work on, that are more like generative interactive art (think "processing" (http://processing.org))

I'm good with javascript, and have the book "Actionscript 3.0 Cookbook." Actionscript seems straightforward enough. My biggest stumbling block is the Flash authoring environment. Is there a good book that covers the environment from a programmer's perspective? Everything I've seen is geared more towards designers.