// init controller
var controller = new ScrollMagic.Controller();
// build tween
var tween =
TweenMax.to(videoOrange, 0.5, {scale: 1.2, repeat: 5, yoyo: true});
// build scene and set duration to window height
var scene = new ScrollMagic.Scene({trigger: '.video-mask__content', duration: "100%"})
.setTween(tween)
.addIndicators() // add indicators (requires plugin)
.addTo(controller);