The idea is simple.
We have already forums in which you can present images with text. To get help with programming problems. So I thought why not include video in this mix. An image tells a thousand words. Audio + video makes it even more simple to include stuff that are important that you might have otherwise missed.
A simple screencast recording makes the procedure very fast and efficient. No need for a lot of screenshots. Just add some text to the video.
I think this could work for bugs, problems and sharing of ideas.
Using Youtube for programmers you get a quick and efficient way to communicate.