I think what you are seeing is a video that origin
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You can now play a nFusz video seamlessly within Twitter and Facebook. That is a big deal vs. publishing a link on those social giants and being whisked away to another site for a video with interactivity.
Will nFusz video's play natively in youtube one day? I don't think it matters but that would be great as well.
Keep in mind the video and interactivity works on other sites. Not easy vs. a static video with hard coded interactivity on a web page the coder controls.
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