Is is possible to add classes or specified images to include in the lazy load?

I know it’s possible to exclude classes and SRCs, but is it possible to add code to the functions.php to specifically include classes and SRCs that the Rocket Lazy Load plugin doesn’t catch.

My specific case is this.

I have a site that uses Divi and features an embedded Vimeo video. Rocket Lazy Load doesn’t lazy load Vimeo videos, so I’m using another solution for that. However, the overlay thumbnail image – served from i.vimeocdn.com isn’t being lazy loaded as an image by Rocket Lazy Load. Is it possible to add code to the functions.php to ensure any image from i.vimeocdn.com is lazy loaded by Rocket Lazy Load?

Thanks.