Video and Animation

British Pathe Newsreels YouTube channel of 80,000 British Pathe videos from the 20th century; personal and educational use; contact them for other licensing.
Bottledvideo.com Free stock video footage; HD & SD, single use only  
Creative Commons Links to video sites with Creative Commons licenses.  
Digitalhotcakes Stock video clips; free samples w/ registration  
European Space Agency-Space in Video Search Copyright-protected and CC BY-SA video from the European Space Agency (ESA) gateway to space. Copyright or CC license information accompanies content. Copyright Notice Images provides exact attribution information. Images are from satellites and ESA astronauts aboard the International Space Station. FAQ for CC content lists conditions for CC use.  
Entertainment Magazine Online Movies Public domain films   
GiveMeFreeArt Free video backgrounds (and other content); requests that users participate in forum or upload   
Internet Archive Many public domain and CC materials; e.g., click Open Source Movies, Vintage Educational Films, Ephemeral Films,  & Prelinger Archives.  
Life of Vids Short CC0 videos for personal and commercial use. Can download low res from site or click link to Vimeo for HD. Some are time-lapse video. Suggested credit: www.lifeofvids.com and/or www.leeroy.ca. Hosted by Leeroy Advertising Agency in Montreal, Quebec, Canada. Shots of people are blurred so no issue with model release. Also provides CC0 photos at Life of Pix.  
Motion Backgrounds for Free Small collection of free backgrounds and stock footage, all content feeds to VideoBlocks (see below). Sign up required. Read license agreement very carefully for exact details.  
Movietools.info Click Free Content/Video Background Loops on left nav bar; commercial & educational use; based in Germany. See company details for exact use.  
OpenFootage.net CC time-lapse video and photos.  Low-res downloadable with a CC NC-ND license.  
Partners in Rhyme Free Video Loops HD video; many free  
Pond5 Public Domain Project Original footage (vastly improved from Lib of Congress & Nat'l Archives), audio (Musopen, Lib of Congress, others), images (NASA and The Commons libraries), and 3D models (NASA). Be aware of model release issues.  
Public Domain Torrents Public domain films downloadable with Bit Torrent software  
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NASA & SPACE
NASA Copyright and Multimedia Guidelines Attribute all NASA content, even that in the public domain. Credit information usually accompanies the media. Individual sites may have specific attribution format. No model releases, so you must obtain permission from identifiable people for any commercial use.  
NASA Video Video from the International Space Station, satellites, mission spacecraft, and awesome data visualizations. Links to downloadable media in the descriptions.  
Space to Ground Videos from the International Space Station.  
Ultra High Definition Video 4K video from the International Space Station, satellites, mission spacecraft, and awesome data visualizations. Links to downloadable media in the descriptions.  
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Stock Footage for Free Small collection of HD and standard stock video; register to download. All content feeds to VideoBlocks (see below). Sign up required. Read license agreement very carefully for exact details and be aware of free trial offers.  
VideoBlocks Stock footage, backgrounds, and After Effects templates. Subscription-based, offers 7 days for free downloads, then charges to credit card, so you need to be vigilant about cancelling on time. Very aggressive email marketing and retention practices, so be careful. Owns many smaller sites that offer some free content with not-so-clear links back to VideoBlocks. Company also owns AudioBlocks and GraphicStock; same practices. Review the license agreement for exact details.  
Vidsplay HD clips for personal and commercial use with attribution or link. MP4 format. Must add a credit link to Vidsplay.com on website, ending credits of video production or in the description for online media channels. Special licensing also available for very reasonable fees.  
Vimeo-Creative Commons Search videos created with Creative Commons licenses. Search results do not include the CC license and a lack of breadcrumb navigation combine to make searching tricky.
YouTube-Creative Commons
Search videos created with Creative Commons licenses.
 
YouTube-EDU
Search educational videos for classroom lessons or as full courses.