Facebook's Video on Instagram is undoubtedly riding on Vine's coattails, but is it any good? We gave the app a quick shakedown on both Android and iOS, and it's safe to say the answer is "yes." Basic video browsing and capture are about as seamless as on the Twitter-owned Vine service, with a few tweaks: Instagram won't auto-loop videos, and those 15-second clips allow for a little more creativity. It's only once you dive in that you notice the truly noteworthy differences, ho