Singing for a Clean community

This video clip is one of my first few shots with my panasonic camera.
I do not actually know how to shoot video clips. I personally feel this video clip is totally a poorly taken with any study of lightings involved.
I was wondering if someone knows where I can get a free refresh course on filming short video clips. Or maybe a cheap low end course to get started in.
Please give some comments on my poor work.
Thank you.
John.