Twitter announces the Promoted Video program, where advertisers can pay to have their videos appear in people’s Twitter stream. The videos do not play automatically, and advertisers are only charged when users view the video:
In the spirit of making campaign setup easier, we now offer advertisers the ability to run ads with a new Cost Per View (CPV) ad buying model. This means advertisers only get charged when a users starts playing the video. Additionally, advertisers using Promoted Video have access to robust video analytics, including completion percentage and a breakout of organic vs. paid video views.