This NASA video describes what the sun is and what it is made out of. 
Part of the discussion is about sun spots and solar flares.  They do a
great job showing actual video and talk on a younger grade level.

This NASA educational video discusses the Aurora Borealis/Northern Lights.

This NASA video demonstrates how scientists compare distances between the planets and the sun using the measurement system, Astronomical Units.  They do a great job discussing scaling and why we use AU's as the measurement system when talking about our solar system.

 This video comes from the Hi-5 singing group.  If you need to get your
little ones up and dancing while learning their 5 senses, then this video would be perfect.

Immerse yourself in an engaging animated video that delves into the captivating world of fossils. Discover a wealth of information about various types of fossils and their intricate formation processes. This educational video covers a wide range of fascinating fossils, including trace fossils, mold fossils, resin fossils, and body fossils. Gain a comprehensive understanding of each type as you explore their unique characteristics and significance. Expand your knowledge and fuel your curiosity through this visually captivating and informative exploration of fossils.

A quick video that will describe erosion found in the mountains and show beautiful scenery, then you have found a good one.  This video shows scenery from high up in the Oregon mountains and has excellent footage of erosion.

This is an introduction to population distributions.  It talks about the three different population distributions:  aggregated, uniform, and random.  The video contains neat footage of animals and plants living in different locations of the world.

In this educational video, scientists from Arizona State University, discuss a little bit about the red planet, what we know about it, and how we go about studying it.  Great introductory video for those studying Mars.

If you are teaching about how predators and prey interact then this video is awesome. It shows a monitor lizard and a cobra fight and defend themselves while trying to eat eggs. Great introductory video.

This scientific video from BBC is really neat.  It shows a few different types of fish that use luminescence to attract prey and obtain their food.