Though it has yet to take off in a major way, the idea behind video comments remains a potentially compelling one. And after seeing some success using its video platform to serve up videos on Twitter, Vidly thinks it can crack the case. And Grammy-winning hip-hop star Chamillionaire and the popular blog commenting system Disqus are helping them try to do that. Launching today, Vidly Express is a way to use Vidly's video platform on any site for visitors to add video comments or responses with the click of a button. And using celebrities like Chamillionaire is an obvious example to get the service some traction. As you can see on his own site , he's already using it to good effect. But Chamillionaire isn't just any celebrity endorser, as we learned first hand during this year's TechCrunch50, he's actually in tune with a lot of interesting things going on in tech — and uses the stuff, so his endorsement is a solid one.