Someone got Camtasia Studio!
I like that program too
Here's my feedback:
1. How is the sound quality?
> Its okay. I don't think soundquality will matter that much with a piano piece, as long as there is sufficient bass, and thats the case here. So: no need to change this.
2. How is the picture quality?
> You're using pan and zoom, and that degrates the quality. You should use the native camera resolution, and not change it at all. The pan and zoom is actually distracting. Other than that, the quality is suffice. If you hadn't ask, I might not have noticed.
3. What angle shots would you prefer?
> First video has the best angle for sure, but the pan and zoom kills it a bit. Just show us the entire keyboard with your hands on it.
4. What resolution do you usually watch videos? (HD/480p/default YT settings etc.)
> The higher the better, but it depends. If a video looks good at 480p (default) I usually don't need to go for a higher setting.
5. What do you think about adding occasional gameplay footage during some part of the music?
> It can work, and it can distract. Personally, I check a video because of the music, not because of what I see, and if I keep seeing someone play, suddenly going away from that can feel awkward. But if such clip would be played together with you playing the piano, sure. That would work. In CamTasia Studio 8, you can even do things like transparency, cropping the video, removing a color, etc.