Mother Nature - New Art Exploration - Fire, Earth, Air, Water

Hey fellow hippies! I'm starting a new thing with my digital art and was hoping to get some feedback.

I started this new youtube channel at Graphic Design Explorer where I am creating a Mother Nature series. So far I only have Earth and Fire done but I plan to do Air and Water also.

Here are the specific videos:

Fire:
Earth:

I've also started a shop where I'm going to sell prints of my digital art. Let me know what you think of the videos and of the prints. I'm not sure if that is fair pricing. Thank you for any feedback!