const banner = document.getElementsByClassName("banner-section")[0]

function playVideo(elementId) {
	var element = document.getElementById(elementId);
	
	element.style.visibility = "visible";
	element.style.opacity = "100%";
	element.play();
	
	banner.style.background = "black";
}

function stopVideo(elementId) {
	var element = document.getElementById(elementId);
	
	element.style.visibility = "hidden";
	element.style.opacity = "0%";
	element.pause();
	element.currentTime = 0;

	banner.style.removeProperty("background");
}