FairVote has a collection of videos related to electoral reform and voting systems.

IRV Videos
FairVote IRV animation about problems with plurality and runoff elections, and the advantages of IRV.
FairVote IRV animation for students explaining the spoiler problem and what IRV can do to fix it for a student audience.
Commissioner Mulroy's Elevator Explanation of IRV: Shelby County (TN) Commissioner, Steve Mulroy, explains the benefits of Instant Runoff Voting in 15 seconds.
Elect-A-Date animation from FairVote MN: a spoof dating show comparing plurality elections and IRV.
Voting reform animation created in support of the 2006 ballot initiative for IRV in Pierce County, WA.
Howard Dean explains why he supports IRV.
Video introduces voters in Cary (NC) to IRV.
Voter education from San Francisco explains how to vote in San Francisco's IRV elections and how the votes are counted.

Proportional Voting Videos
John Cleese explains proportional representation using examples from the United Kingdom. [Short Version]. [Long Version].
British Columbia Citizens' Assembly animation explaining how choice voting (called "BC-STV" in the video) works.
Cumulative Voting in Illinois documentary.
Steve Hill interviewed on Proportional Representation and the Electoral College.

National Popular Vote
Video from FairVote NC advocating the National Popular Vote plan.

Election Reform
A montage of videos from entrants and winners of FairVote's Upgrade Democracy competition.  Entrants were asked to produce a video to answer the question "If you could change anything about elections, what would our democracy look like?"
Tribute to former FairVote Board President and Presidential Candidate John Anderson.