Vine – Twitter's video sharing service – has added a bunch of new features, the biggest of which is the ability to import video clips already shot and stored on your phone. Other changes include the option to undo your last recording and a flashlight for recording in low light; and focus lock now works with the front-facing camera. There's also a handy little spirit level incorporated into the grid overlay. What – you don't Vine? Unlike the popular Twitter accounts we follow for the rapier wit packed into 140 characters or less, it's all about the micro comedy sketches. This is surprisingly difficult to craft, given the six-second limit. Try out David Lopez or Jake Paul.