ReadWrite writes, Continuing our review of the first half of 2012, we look at an emerging product type that became popular this year: social video apps. The two leading contenders are Socialcam and Viddy, each vying to be the breakout app. But at least one of those apps is using dubious seeding tactics to get ahead... After image sharing network Instagram was acquired by Facebook in April, attention turned to the same type of app - but for video. Essentially social video apps have the following characteristics: Mobile-based, just like Instagram. These are smartphone apps that enable you to shoot short videos...