When CEO Kevin Systrom announced that Instagram was branching out into video sharing in June, many thought that the demise of competitor Vine was inevitable. That turned out not to be true, with mobile users sharing more video than ever from both platforms.
We can't talk about mobile without mentioning the rise of Snapchat, the instant media-sharing platform that lured a large teen audience from Facebook this year. Snapchat's easy-to-use, instantaneous, and, most importantly, temporary video-creation tools had mobile users capturing live action like never before. Instagram even responded to Snapchat's growth by introducing direct message, which offers users a way to send media privately.