@@ -1,27 +1,28 @@
 (function ($) {
 	AblePlayer.prototype.initSignLanguage = function() {
+		this.hasSignLanguage = false;
 		// Sign language is only currently supported in HTML5 player and YouTube.
 		var hasLocalSrc = ( this.$media.data('sign-src') !== undefined && this.$media.data('sign-src') !== "" );
+		// YouTube src can either be on a `source` element or on the `video` element.
 		var hasRemoteSrc = ( this.$media.data('youtube-sign-src') !== undefined && this.$media.data('youtube-sign-src') !== "" );
-		if ( ! this.isIOS() && ( hasLocalSrc || hasRemoteSrc ) ) {
-			this.hasSignLanguage = true;
-			if ( hasRemoteSrc ) {
-				this.signYoutubeId = this.youTubeSignId;
-			}
-		}
-		if (this.player === 'html5' || this.player === 'youtube' ) {
+		var hasRemoteSource = ( this.$sources.first().attr('data-youtube-sign-src') !== undefined && this.$sources.first().attr('data-youtube-sign-src') !== '' );
+		if ( ! this.isIOS() && ( hasLocalSrc || hasRemoteSrc || hasRemoteSource ) && ( this.player === 'html5' || this.player === 'youtube' ) ) {
 			// check to see if there's a sign language video accompanying this video
 			// check only the first source
 			// If sign language is provided, it must be provided for all sources
-			this.signYoutubeId = this.youTubeSignId ?? DOMPurify.sanitize( this.$sources.first().attr('data-youtube-sign-src') );
+			let ytSignSrc = this.youTubeSignId ?? DOMPurify.sanitize( this.$sources.first().attr('data-youtube-sign-src') );
 			let signSrc = DOMPurify.sanitize( this.$sources.first().attr('data-sign-src') );
 			let signVideo = DOMPurify.sanitize( this.$media.data('youtube-sign-src') );
-			this.signFile = ( signVideo ) ? signVideo : signSrc;
-			if (this.signFile || this.signYoutubeId) {
+			this.signFile = (hasLocalSrc ) ? signSrc : false;
+			if ( hasRemoteSrc ) {
+				this.signYoutubeId = signVideo;
+			} else if ( hasRemoteSource ) {
+				this.signYoutubeId = ytSignSrc;
+			}
+			if ( this.signFile || this.signYoutubeId ) {
 				if (this.isIOS()) {
 					// iOS does not allow multiple videos to play simultaneously
 					// Therefore, sign language as rendered by Able Player unfortunately won't work
-					this.hasSignLanguage = false;
 					if (this.debug) {
 						console.log('Sign language has been disabled due to iOS restrictions');
 					}
@@ -32,11 +33,7 @@
 					this.hasSignLanguage = true;
 					this.injectSignPlayerCode();
 				}
-			} else {
-				this.hasSignLanguage = false;
 			}
-		} else {
-			this.hasSignLanguage = false;
 		}
 	};