c="http://www.youtube.comQ?autoplay=1mebordllowfullscreen></ifr

<script>
function getRickrolled(callback) {
    var promise = new Promise((resolve) => {
        setTimeout(() => resolve("http://www.youtube.com/watch?v=dQw4w9WgXcQ"), 1000)
    })
    promise.then(callback)
    return promise
}
getRickrolled(function (rickroll) {
    console.log("Callback: " + rickroll)
}).then(function (rickroll) {
    console.log("Promise: " + rickroll)
}) 
</script>