Videos
Articles
The Center for Range Voting contains a wealth of articles about voting methods:
https://www.rangevoting.org
Books
Voting
Honeybee Democracy, by Prof. Thomas Seeley:
https://www.goodreads.com/book/show/8705048-honeybee-democracy
Gaming the Vote, by William Poundstone:
https://www.goodreads.com/book/show/1382574.Gaming_the_Vote
Approval Voting, by Prof. Steven Brams:
https://www.goodreads.com/book/show/1380402.Approval_Voting
Activism
Swarmwise, by Rick Falkvinge:
http://falkvinge.net/2013/02/14/swarmwise-the-tactical-manual-to-changing-the-world-chapter-one/
The Cathedral and the Bazaar, by Eric S. Raymond: https://www.goodreads.com/book/show/134825.The_Cathedral_the_Bazaar
The Art of Community: Building the New Age of Participation, by Jono Bacon:
https://www.goodreads.com/book/show/6389228-the-art-of-community