Flickr
Features:
Flickr hosts millions of Creative Commons-licensed images. Notably, Flickr provides a separate Creative Commons licensed videos collection
- which makes the filtering process easy too.
- Finding the license information of each Flickr image may seem a bit complicated at first glance but it is actually quite simple. Please follow the directions below.
Easily cite Flickr images with imagecodr.org
This website provides correct HTML code for embedding an image with complete attribution citation. If you use it often, add code to your browser's toolbar to let you check a Flickr image you're viewing (it's easy to add, just drag and drop).
How to search for a CC licensed image in Flickr
The best way to search for a CC licensed image in Flickr is using the CC licensed image collection. Go to https://www.flickr.com/creativecommons/. Click See more under each license collection. 
Type your keyword in the search window. After locating the video with your preferred license terms, check the license information. 
The CC license notice is linked to each respective license deed.
License Setting
All CC licensed images in Flickr are released under Version 2.0.
Sample Attribution
Elephant@Amboseli by Xiaojun Deng is licensed under CC BY
Source: "Flickr" by Open Washington: Open Educational Resources Network is licensed under CC BY 4.0
