Fullscreen fallback for older browsers

assets/less/docs.less

@@ -130,8 +130,8 @@ a {
 .example-video .player {
 	margin: 0 auto @padding-base;
 
-	&:fullscreen,
-	&-fullscreen {
+	&-fullscreen,
+	&.fullscreen-active {
 		max-width: none;
 	}
 }

assets/less/plyr.less

@@ -349,15 +349,15 @@
 
 	// Full screen mode
 	&-fullscreen,
-	&:fullscreen {
-		position: absolute;
+	&.fullscreen-active {
+		position: fixed;
 		top: 0;
 		left: 0;
 		right: 0;
 		bottom: 0;
 		height: 100%;
 		width: 100%;
-		z-index: 999999;
+		z-index: 10000000;
 
 		.player-video-wrapper {
 			height: 100%;