http://techcrunch.com – You may have thought you’d seen every permutation of the video-sharing app, given the glut of new startups scrambling to become the “Instagram of Video,” or some derivation thereof. There’s Viddy, Socialcam, Round, Threadlife, Klip, Tout, ooVoo, Frameblast and if you wait a day, there will probably be a few more. As Peter Csathy wrote recently, mobile video does indeed present a huge market opportunity, but it’s one that few (if any) startups have gotten right, and it’s a much harder nut to crack than many seem to realize. Streamweaver, a Nashville-based sta (IT news)