[jsinterp] Workaround operator associativity issue

https://github.com/yt-dlp/yt-dlp/issues/4635#issuecomment-1235384480

test/test_youtube_signature.py

@@ -126,6 +126,10 @@ _NSIG_TESTS = [
         'https://www.youtube.com/s/player/c57c113c/player_ias.vflset/en_US/base.js',
         'M92UUMHa8PdvPd3wyM', '3hPqLJsiNZx7yA',
     ),
+    (
+        'https://www.youtube.com/s/player/5a3b6271/player_ias.vflset/en_US/base.js',
+        'B2j7f_UPT4rfje85Lu_e', 'm5DmNymaGQ5RdQ',
+    ),
 ]
 
 

yt_dlp/jsinterp.py

@@ -117,8 +117,8 @@ _OPERATORS = {  # None => Defined in JSInterpreter._operator
     '-': _js_arith_op(operator.sub),
 
     '*': _js_arith_op(operator.mul),
-    '/': _js_div,
     '%': _js_mod,
+    '/': _js_div,
     '**': _js_exp,
 }