PNG codec footage with alpha channel problem

Hello I have uploaded an animation footage with PNG codec with alpha channel. The thumbnail shows image with objects on black screen and can be seen. But when I play the video it just show a white screen and the gold particles falling not visible. Please help.


Video No. 94690417
Link https://www.pond5.com/stock-footage/94690417/animation-golden-spatter-confetti-falling-rain-transparency.html