Annotations on YouTube videos are potentially a powerful marketing and sales tool but too much can undermine viewer interest with noise. Matt Gielen, Director of Programming and Audience Development at Frederator, noticed just how annoying Vimeo's music video annotations were and realized he needed to take a look at how his team was using annotations at Cartoon Hangover. The results didn't surprise me but they may just surprise you. As part of his duties for Frederator Matt Gielen leads the programming team that's building Cartoon Hangover, a YouTube channel with well over a million subscribers. Gielen says he was watching...

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