App demo video export quality

[F_Bryant]

So I recorded my footage of my app in the simulator and my .mov files looked nice, I took them all into iMovie 08 to add music and transitions, then exported.

Wow, the quality is awful... I exported as a .mov with the very best quality and it doesn't even look remotely acceptable. I tried a few other formats and they looked dire too, has anyone else come across this?

I was about to say what great software iMovie is, but it's suddenly looking like one of the most useless programs I've ever seen. I surely must be going wrong somewhere? If I open my event clips they all look fine in Finder, it's the export that kills it.