diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 9595bcf9f..877879446 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -2109,10 +2109,13 @@ def js_to_json(code):
 
         return '"%s"' % v
 
+    # fixing , followed nothing, but comments
+    # fixing unnecessary ? in /\*.*?\*/
+    # fixing greedy comment
     return re.sub(r'''(?sx)
         "(?:[^"\\]*(?:\\\\|\\['"nurtbfx/\n]))*[^"\\]*"|
         '(?:[^'\\]*(?:\\\\|\\['"nurtbfx/\n]))*[^'\\]*'|
-        /\*.*?\*/|,(?=\s*[\]}])|
+        /\*[^*]*\*/|,(?=(\s|(/\*[^*]*\*/))*[\]}])|
         [a-zA-Z_][.a-zA-Z_0-9]*|
         \b(?:0[xX][0-9a-fA-F]+|0+[0-7]+)(?:\s*:)?|
         [0-9]+(?=\s*:)