Hello,
I saw the screenshot you attached.
1) To change the background color of the video button try the following Custom CSS.
.product-video-button > a {
background: red;
color: white;
}
2) To change the color of the icon try the following Custom CSS.
.product-video-button > a::before {
color: white;
}
3) To change the hover text color add the following Custom CSS.
.product-video-button > a:hover {
color: white;
}
You can adjust the colors according to your needs.
Best Regards.
.
