Fixed db_schema.sql

db_schema.sql

@@ -230,7 +230,7 @@ CREATE TABLE IF NOT EXISTS `videos_data` (
   `video_format` INTEGER NOT NULL,
   `hash` varchar(32) NOT NULL,
   `source` INTEGER,
-  `duration` INTEGER NOT NULL
+  `duration` INTEGER NOT NULL DEFAULT '0'
 );
 CREATE TABLE IF NOT EXISTS `announcements` (
 `id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,