Facebook adds video sharing to Instagram but 'didn't design it with advertising in mind'Facebook on Thursday (yesterday Bangkok time) added smart phone video-sharing to its Instagram photo-based social network, in a move challenging Twitter's popular Vine service. "We need to do to video what we did to photos," Instagram co-founder Kevin Systrom said while unveiling Video On Instagram at a press event at Facebook's headquarters in the Silicon Valley city of Menlo Park..