ScienceHack

ScienceHack is a video search engine dedicated to the world of science, including physics, green energy, and space. What sets it apart from the rest is that every indexed video is screened and approved by real scientists. Search for a video by keyword or by selecting a tag. Clicking on "Chemistry" led us to over 20 videos on the topic, such as "Jay Leno and Josh Duhamel Sniff Sulfur Hexafluoride."

From: PC Magazine