According to this YouTuber, it shows some pretty damning evidence that editing was used to make this coin turn into a rose petal.

Captain Disillusion shows just how America's Got Talent edited this magic trick to make it look better/more seamless.

In the video, he shows how they held the image of one coin by just a frame or two. The table shakes, but the coin doesn't move as the rest of the three coins do.