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chrissinchok At very minimum the API defined in that plugin is shared by all modern preroll scripts I've ever worked with, and where I've seen code it has lots that borrows from there. JWPlayer's definitely did when I worked with it and they covered 2 mil sites in 2015 thedrum.com/news/2015/08/07/how-jw-player-became-largest-video-player-behind-youtube-and-facebook
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chrissinchok It can be very easy to spot when they use the actual code, because there's a hard to spot-in-code NaN error that can be forced on-site occasionally that almost none of the derivative code ever patches. :P