Perspective iFrame Youtube video autostart

Is there a way to have a youtube video autostart? I’ve added the “&autoplay=1” to the url, but with no luck. Nothing I seem to do is able to get the video to start automatically.

I do get the following error in the console, but I cannot seem to make heads or tails of it.

15:46:18.926 [Browser Events Thread] INFO Perspective.Designer.BrowserConsole - Mixed Content: The page at 'https://www.youtube.com/embed/9Auq9mYxFEE' was loaded over HTTPS, but requested an insecure script 'chrome-extension://enhhojjnijigcajfphajepfemndkmdlo/cast_sender.js'. This request has been blocked; the content must be served over HTTPS.

I’d settle for a way to programmatically click on the iFrame, but I’m assuming I cannot figure that one out either because it would be some sort of security hole.