diff --git a/php/class-delivery.php b/php/class-delivery.php
index 703618123..79f8c0402 100644
--- a/php/class-delivery.php
+++ b/php/class-delivery.php
@@ -387,6 +387,11 @@ public function is_deliverable( $attachment_id ) {
 		if ( $is ) {
 			$meta = wp_get_attachment_metadata( $attachment_id, true );
 			$is   = ! empty( $meta['width'] ) && ! empty( $meta['height'] );
+
+			// Webm audio files don't have width and height.
+			if ( ! $is && ! empty( $meta['mime_type'] ) && 'audio/webm' === $meta['mime_type'] ) {
+				$is = true;
+			}
 		}
 
 		if ( ! $is ) {
diff --git a/php/media/class-video.php b/php/media/class-video.php
index f8a14d87e..739f8f6ba 100644
--- a/php/media/class-video.php
+++ b/php/media/class-video.php
@@ -389,6 +389,7 @@ protected function build_video_embed( $source, $attributes = array(), $overwrite
 
 		// If it is an attachment, get the video metadata.
 		if ( $attachment_id ) {
+
 			// Check for transformations.
 			$transformations = $this->media->get_transformations( $attachment_id, array(), $overwrite_transformations );
 			if ( ! empty( $transformations ) ) {
@@ -410,6 +411,12 @@ protected function build_video_embed( $source, $attributes = array(), $overwrite
 				);
 				$params['source']['transformation'] = array_merge( $streaming_transform, $transformations );
 			}
+
+			$meta = wp_get_attachment_metadata( $attachment_id, true );
+
+			if ( ! empty( $meta['mime_type'] ) && 'audio/webm' === $meta['mime_type'] ) {
+				$params['source']['source_types'] = array( 'audio' );
+			}
 		}
 
 		$video_defaults = array(