  Faced with the challenge of attracting user attention and revenue, social
media websites have turned to video advertisements (video-ads). While in
traditional media the video-ad market is mostly based on an interaction between
content providers and marketers, the use of video-ads in social media has
enabled a more complex interaction, that also includes content creator and
viewer preferences. To better understand this novel setting, we present the
first data-driven analysis of video-ad exhibitions on YouTube.
