Israel Hyman has been producing great video technique tips for years. I met him a couple of times at PodCampAZ and he is a great guy.
Take a moment to visit his site, Izzy Video. There is a huge amount of information there to help you improve the quality of your videos.
Learn how to turn a hard light into a soft light. Also, learn how to tell the difference between a hard light and a soft light. Check out the full article to read all the details about how to do that.