If that's iOS devs you're talking about, try looking into integrating Facebook's Pop framework into your projects. This way you can export copy-paste ready code from Origami - also by Facebook- that allows for easy tweaking. You can also get your hands dirty in Xcode, the syntax for animations is easy enough to read and correct by yourself. To be honest I never had much luck in handing over movie files to developers, the differences in timing, easing, curves always meant that I had to correct stuff manually but your mileage may vary. There's also Framer.js which uses code to accomplish things, so it might be easier for devs to follow along.