@kricke73 You could do a similar effect with Velo, but it won’t be the exact effect (since Velo doesn’t support mousedown events).
So as I said you can do it in an iframe (embedded widget) or a custom element.
They used 2 different png images as background . one for pressed button and one for not-pressed button , and they switched them when the button is active (:active css).
(P.S. You can do something without images if you like, using transform:matrix() as you can see here , but it won’t be 100% identical).
They let you use their button by setting the iframe src to “https://www.myinstants.com/instant/michael-scott-thank-you-98625/embed/”
But it’ll come with credit for the developer (I suggest you’ll build one of your own).