Minute Earth is a Youtube channel which has amazing science videos. They are high interest and would be great to play for students from upper elementary to high school. Some of the topics of the videos are: “How to make seashells, just add water,” “Which Came First the Rain or the Rainforest”, and “Why is All the Sand the Same?” just to name a few! They are really well done!
You can follow them on Twitter as well.