function dozent_has_video( $post = null, $key = null ) {
		$post = get_post( $post );

		$video        = dozent_get_video( $post->ID );
		$video_source = dozent_array_get( 'source', $video );

		if ( $video_source && $video_source !== '-1' ) {

			if ( $key ) {
				$property_value = dozent_array_get( $key, $video );

				/**
				 * Filter default return value by video property
				 *
				 * @see dozent_has_video();
				 *
				 * @since DozentLMS 1.0.0
				 *
				 * @param mixed $property_value Value of video info
				 * @param array $video Video info in array
				 * @param string $key Video Property Key
				 */

				return apply_filters( 'dozent_has_video_property', $property_value, $video, $key );
			}

			/**
			 * Filter default return value
			 *
			 * @see dozent_has_video();
			 *
			 * @since DozentLMS 1.0.0
			 *
			 * @param array $video Video Info if exists
			 * @param WP_Post $post Post Object
			 */

			return apply_filters( 'dozent_has_video', $video, $post );
		}

		/**
		 * Filter default return value
		 *
		 * @see dozent_has_video();
		 *
		 * @since DozentLMS 1.0.0
		 *
		 * @param bool false False
		 * @param WP_Post $post Post Object
		 */

		return apply_filters( 'dozent_has_video', false, $post );
	}