Demo per Cannon Thunder
<style>#SCcont2647{width: 100%;padding-top: 56.25%;position: relative;}#SCgFrame2647 {position: absolute;top: 0;left: 0;bottom: 0;right: 0;}</style> <div id="SCcont2647"> <iframe id="SCgFrame2647" frameborder="0" allowfullscreen="" mozallowfullscreen="" webkitallowfullscreen="" hspace="0" vspace="0" scrolling="none" src="https://slotcatalog.com/it/slots/Cannon-Thunder?ajax=1&blck=demo-widget" width="100%" height="100%"></iframe> </div>
copia