protected function raw( $key ) {

		$value = '';

		// If the property exists in the meta array.
		if ( isset( $this->meta[ $key ] ) ) {

			$value = $this->meta[ $key ];

		// If the property exists in the image meta array.
		} elseif ( isset( $this->meta['image_meta'] ) && isset( $this->meta['image_meta'][ $key ] ) ) {

			$value = $this->meta['image_meta'][ $key ];

		// If the property exists in the video's audio meta array.
		} elseif ( isset( $this->meta['audio'] ) && isset( $this->meta['audio'][ $key ] ) ) {

			$value = $this->meta['audio'][ $key ];
		}

		return $value;
	}