Changing the homepage from a video animation when it is horizontal to a regular image when it is vertical like on mobile

Site URL: https://www.stonefishanimation.com/

Hello,

I was hoping someone could help me out with code that makes it so when the homepage is viewed vertical, the video animation that plays normally will instead fade to a vertical image. I have attached the video and image below. When the video plays on vertical mobile, only a small portion is shown. The image below is in the vertical aspect ratio. Here is the link to the website: https://www.stonefishanimation.com/

Thank you so much 

- Stonefish Animation

Try adding to Design > Custom CSS

/* Mobile */
@media screen and (max-width:767px) {
[data-section-id="61c7807760e3d630052df709"] video {
    width: 100% !important;
    height: auto !important;
    position: fixed !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%,-50%) !important;
}
}