While this is geared towards journalism and devices like the Flip Mino and the Kodak Zi8, the techniques and things to look out for are the same on a mobile phone – especially with HD recording just around the corner with the N8.
Sharma touches on the three types of shot you need to capture (wide angle, mid range, and close up), plus lighting and sound in the video, which you can watch on the BBC Journalism Blog.
(Sorry, it won't embed here, but click through to watch the video).
I’m hoping for a second video talking about how to edit your collection of shots, but until then you could have a look at Charlie Brooker’s (slightly very tongue in cheek) guide to filming a news item - which, thankfully, will embed: