NOVA
It’s the most watched prime time science series on American television, and their website has a generous selection of video clips and even entire episodes.
World Science Festival
The World Science Festival brings together top scientists from all over the world to deliver lectures and participate in symposia and virtually all of them, plus some special programs produced just for the website, are included here for free.
Vsauce
Created by Michael Stevens, Vsauce has grown to be one of YouTube’s most popular science channels, with over 16 million subscribers. The channel covers almost every facet of science and technology and has spun off Vsauce2, Vsauce3 and a variety of other offspring.
SciShow
Hank Green’s incredibly popular daily science video series, now with co-presenters Michael Aranda, and Olivia Gordon, covering science news, answers to science questions, and disquisitions on cool science topics.
Crash Course
Founded by Vlog Brothers Hank and John Green, this YouTube channel offers over 30 courses on a variety of topics, from organic chemistry to theater.
ASAPscience
Mitchell Moffit and Gregory Brown team up to make science make sense at this super popular YouTube channel.
Labroots Trending Videos
This site presents videos produced in support of new science research, generally by the researchers themselves or their institutions. Explanatory stories accompany each video, describing the research and key findings.
Smithsonian Video
Video clips from the Smithsonian Channel.
Science Channel on YouTube
Clips and entire episodes of popular Science Channel shows