The first video is a little dated but its still relevant. It shows young elementary students at the end talking about art and making their own observations and relating what they see to their own experiences. I see this as so important to promoting critical thinking in students.
The second video is from the website http://www.vtshome.org/what-is-vts and speaks is a method of talking about art that is student centered. Working in this format moves away from seeing the teacher as the sole keep of knowledge and asks students to be active and engaged observers of the world.
Jump to 22 minutes and 5 seconds.