How can I make the YouTube player scale to the width of the page but also keep the aspect ratio?

Question

I have a YouTube video I want to put on my web page.

I want to scale the video to fit to a percent of the users browser but also to keep the aspect ratio.

I hav

Answer 1

Quite easy with some javascript.

jQuery(function() {
    function setAspectRatio() {
      jQuery('iframe').each(function() {
        jQuery(this).css('height', jQuery(this).width() * 9/16);
      });
    }

    setAspectRatio();   
    jQuery(window).resize(setAspectRatio);
});