The fundamental problem here is that I don't know if I want to tweet about a video before I watch it. A tweet is like an endorsement, especially when you have the extreme burden of more than 10 twitter followers (as I have) - you have a responsibility to your adoring public to ensure you fill your stream with high quality, relevant content.<p>All jest aside, I think it's a great idea to have the ability to tweet <i>during</i> a video as a seamless experience.<p>You've chosen a great example with Mixergy. Andrew's interviews are LOOONG and I'm frightfully busy. I love watching his videos but I rarely make it through to the end. If I have a tab open with hootsuite in it I'll quite often hop across and tweet that I just watched the video, if the video were <i>totally awesome</i> I'd open up a tab to get to hootsuite and tweet about it but if it's nice and interesting but not bone shatteringly good, no-one but me and Wistia's video hosting stats will know that I watched it.<p>If, however, the "Are you enjoying this video? Click to tweet about it right now" came up <i>during</i> the first half of a video, I'd be far more likely to spread the word about what I'm watching more often. Obviously it would have to be less obtrusive than it is now and it shouldn't interrupt the flow of the video at all.