You didn't do anything wrong. It loaded fine, just probably very slowly for you due to the low bandwidth. Same reason why you might not be able to play it. And 10 seconds is not very long, just enough length to give us a taste of your little brood.
Loaded and ran perfectly for me too. I love your new girls! Reminds me of my granddaughter's favorite song that I taught her this summer --- from The Music Man, "pick a little, talk a little, pick a little, talk a little: cheep cheep cheep! Talk a lot, pick a little more!"