Thanks for all the comments. A couple answers to random questions:
1. Making a video with Camtasia is pretty easy, the hardest part was getting the audio to work. For some reason, my audio wasn't getting captured, even though I can "see" it under the audio track after the video is done (you can "see" the sound waves, etc.). So I had to redo the voice narration over again. Other than that, it's a snap.
2. If the audio doesn't work, make sure you're using Windows Media Player. You might need to download an audio codec, try the TechSmith one
here .
3. Here's a pic of my HUD layout: