Jan 24, 2013 — Twitter launches Vine, a video-sharing app that allows users to post succinct videos directly onto tweets. The app is reminiscent of Instagram and seems familiar at a time when animated GIFs are all the rage.
Feb 8, 2013 — Twitter's Vine video app is just 2 weeks old, but it's already been updated to add a 17+ rating. However, any user can just click "OK" to get around the age limit. Internet safety advocates say social media sites aren't doing enough to protect younger users from inappropriate material.