Persistent Audio or Video embedded with <iframe> even after dispose()

[magicarchitect]

Hi there! First of all, congrats for this awesome plugin :)

My problem is the following: when the HTML content contains an <iframe> with an embedded Youtube, Vimeo or SoundCloud vídeos/audios, when the users changes to other Widget -> Navigatior.of(context).pop() the video or audio are still playing in the background... even if I call to dispose() on the Webview Controller.

@OverRide
void dispose() {
super.dispose();
webviewController.dispose();
}

How can I stop playing the iframe object?