To get started with Vine, you simply need to install the app. It's available at the iTunes store for Apple devices; if you own an Android device, you'll grab Vine from the Google Play archive.
Right away, you can start watching videos made by other people. As with Twitter, you can choose to follow specific Vine creators, and when you do so, their videos will appear in your Vine feed. Scroll through the feed and those clips automatically begin playing. They continue looping, constantly playing, until you move on to the next video, or until you tap the screen to pause them.
Below each video clip, you'll see options that let you view and post comments. You can also like a video clip or share clips with your friends by "revining," which is just like retweeting in Twitter. If it becomes necessary, you can also block specific users from interacting with you.
Press "Explore" to browse through various sections, such as comedy, sports, pets and a whole lot more. Be forewarned that Vine is rife with what the site refers to as "sensitive" posts, which often contain either violence or pornography. You can filter these out to some degree by disabling sensitive posts, but this system isn't perfect, so take care as to where you watch randomly selected Vines.