John Gruber doesn't like that Instagram added Vine-esque video recording:
They did this to spite Vine (and Twitter, which owns Vine), not because it makes Instagram better, because it doesn’t make Instagram better, it makes it worse. Slow to load, noise I don’t want, bursts their bubble of simplicity and focus. Thankfully there’s a setting to turn off “Auto-Play Videos”; otherwise I’d abandon ship.
I agree completely, and I'm thankful for the Auto-Play Video toggle.
I'm happy with Vine, although I don't use it much. I don't need Instagram to shoot video too. I liked Instagram when it was just about photos. Gruber's right on that their simplicity bubble has burst.