.container{width:100vw;height:300vh;position:relative}.stickyMask{justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:sticky;top:0;overflow:hidden;-webkit-mask-image:url(/images/mask.svg);mask-image:url(/images/mask.svg);-webkit-mask-position:50%;mask-position:50%;-webkit-mask-size:80%;mask-size:80%;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat}.stickyMask video{object-fit:cover;width:100%;height:100%}