From 434406a9820961433a530844fc2e5e75c1983e0a Mon Sep 17 00:00:00 2001
From: pukkandan <pukkandan@gmail.com>
Date: Mon, 23 Nov 2020 01:55:14 +0530
Subject: [PATCH] Cleanup YoutubeTabIE _VALID_URL regex

---
 youtube_dlc/extractor/youtube.py | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/youtube_dlc/extractor/youtube.py b/youtube_dlc/extractor/youtube.py
index e24b9f3a4..30f1a024e 100644
--- a/youtube_dlc/extractor/youtube.py
+++ b/youtube_dlc/extractor/youtube.py
@@ -64,7 +64,7 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
     _TFA_URL = 'https://accounts.google.com/_/signin/challenge?hl=en&TL={0}'
 
     _RESERVED_NAMES = (
-        r'course|embed|watch|w|results|storefront|'
+        r'course|embed|playlist|watch|w|results|storefront|'
         r'shared|index|account|reporthistory|t/terms|about|upload|signin|logout|'
         r'feed/(watch_later|history|subscriptions|library|trending|recommended)')
 
@@ -2532,12 +2532,11 @@ def decrypt_sig(mobj):
 
 class YoutubeTabIE(YoutubeBaseInfoExtractor):
     IE_DESC = 'YouTube.com tab'
-    _VALID_URL = (
-        r'https?://(?:\w+\.)?(?:youtube(?:kids)?\.com|invidio\.us)/'
-        r'(?:(?!(%s)([/#?]|$))|'
-        r'(?:channel|c|user)/|'
-        r'(?:playlist|watch)\?.*?\blist=)'
-        r'(?P<id>[^/?#&]+)') % YoutubeBaseInfoExtractor._RESERVED_NAMES
+    _VALID_URL = (r'''(?x)
+        https?://(?:\w+\.)?(?:youtube(?:kids)?\.com|invidio\.us)/(?:
+            (?!(%s)([/#?]|$))|channel/|c/|user/|
+            (?P<not_channel>playlist|watch)/?\?.*?\blist=)
+        (?P<id>[^/?#&]+)''') % YoutubeBaseInfoExtractor._RESERVED_NAMES
     IE_NAME = 'youtube:tab'
 
     _TESTS = [{