Thanks for your solutions on this thing, but especially on IE when you’re using video on the heading element, it will show the fallback image instead of the video it self. Actually, when you Edit the slider you can find this note on left side when inserting video url.
Yes we notice those issues too about the parallax. The problem is actually on browser side instead of on our code. This problem is because IE unable to understand RAF (request animation frame) perfectly.
we are using this RAF very extensively so we can get super smooth animation on chrome and firefox that implement RAF on their browser better than IE.
we will continue to look after IE development, and hopefully they will fix this issues.