diff --git a/ythdd_inv_tl.py b/ythdd_inv_tl.py
index d90a5f4..0dce6d1 100644
--- a/ythdd_inv_tl.py
+++ b/ythdd_inv_tl.py
@@ -338,6 +338,9 @@ def videos(data):
 
 	time_start = time()
 
+	if len(data) < 4 or len(data[3]) != 11:
+		return send(400, {"error": "No valid video id."})
+
 	if ythdd_globals.config['general']['cache'] and data[3] in ythdd_globals.video_cache:
 		if ythdd_globals.video_cache[data[3]]['cacheTime'] + 3 * 60 * 60 > time():
 			response = ythdd_globals.video_cache[data[3]]