Originally Posted by
Aquagraph
Cpig, are you sure you're not infringing any copyrights by sharing those videos?
Considering the YouTube account associated with the videos (questioncopyright) has opted for a CC BY license, reuse and republishing is not only permitted, but encouraged. The organization's own web site has a disclaimer at the bottom of every page explicitly stating,
[O]ur content is released to the public and can be considered to be in the public domain: you may copy, share, excerpt, modify, and distribute modified versions of this and other pages from QuestionCopyright.org.
So, yes, I'm reasonably certain I am not infringing upon any copyright claims by sharing these videos. Truthfully, I wouldn't give a damn, even if I were.