The Android version of Vine app has just been released a few days ago. One of the new features (on Android version only) is the ability to zoom. Of course, I tried it on Samsung GALAXY S4 and HTC One but could not. So I dismissed it as the two phones are not supported yet. I was wrong!
So, how the hell do you use the zoom feature. Thanks to CNET (I should have thought about it, haha), the answer is very simple. Use the Volume UP/DOWN for the ZOOM function.
Yes, the rocker switch (depending on your phone model) is the zoom feature. Try it. I am sure the latest Android phones will be supported. Don’t bother to try on iOS as I already tried. It is not working.