Responsive Embedded Video via JavaScript
monkeyraptor.johanpaul.net/2015/05/javascript-making-responsive-size.html
This has
100%
of width, with
16 : 9
dimensions ratio if the window has
< 640px
of width.
Function is invoked at DOM load and window resize event.
This demo needs JavaScript.
See "page source" to see what's in this.