From f2919bd28eac905f1267c62b83738a02bb5b4e04 Mon Sep 17 00:00:00 2001
From: bashonly <88596187+bashonly@users.noreply.github.com>
Date: Tue, 12 Aug 2025 18:24:31 -0500
Subject: [PATCH] [ie/youtube] Add `es5` and `es6` player JS variants (#14005)

Authored by: bashonly
---
 test/test_youtube_signature.py     | 18 ++++++++++++++++++
 yt_dlp/extractor/youtube/_video.py |  2 ++
 2 files changed, 20 insertions(+)

diff --git a/test/test_youtube_signature.py b/test/test_youtube_signature.py
index 456246753..684a6175d 100644
--- a/test/test_youtube_signature.py
+++ b/test/test_youtube_signature.py
@@ -138,6 +138,16 @@
         'gN7a-hudCuAuPH6fByOk1_GNXN0yNMHShjZXS2VOgsEItAJz0tipeavEOmNdYN-wUtcEqD3bCXjc0iyKfAyZxCBGgIARwsSdQfJ2CJtt',
         'JC2JfQdSswRAIgGBCxZyAfKyi0cjXCb3DqEctUw-NYdNmOEvaepit0zJAtIEsgOV2SXZjhSHMNy0NXNG_1kOyBf6HPuAuCduh-a',
     ),
+    (
+        'https://www.youtube.com/s/player/010fbc8d/player_es5.vflset/en_US/base.js',
+        'gN7a-hudCuAuPH6fByOk1_GNXN0yNMHShjZXS2VOgsEItAJz0tipeavEOmNdYN-wUtcEqD3bCXjc0iyKfAyZxCBGgIARwsSdQfJ2CJtt',
+        'ttJC2JfQdSswRAIgGBCxZyAfKyi0cjXCb3DqEctUw-NYdNmOEvaepit2zJAsIEggOVaSXZjhSHMNy0NXNG_1kOyBf6HPuAuCduh-',
+    ),
+    (
+        'https://www.youtube.com/s/player/010fbc8d/player_es6.vflset/en_US/base.js',
+        'gN7a-hudCuAuPH6fByOk1_GNXN0yNMHShjZXS2VOgsEItAJz0tipeavEOmNdYN-wUtcEqD3bCXjc0iyKfAyZxCBGgIARwsSdQfJ2CJtt',
+        'ttJC2JfQdSswRAIgGBCxZyAfKyi0cjXCb3DqEctUw-NYdNmOEvaepit2zJAsIEggOVaSXZjhSHMNy0NXNG_1kOyBf6HPuAuCduh-',
+    ),
 ]
 
 _NSIG_TESTS = [
@@ -377,6 +387,14 @@
         'https://www.youtube.com/s/player/ef259203/player_ias_tce.vflset/en_US/base.js',
         'rPqBC01nJpqhhi2iA2U', 'hY7dbiKFT51UIA',
     ),
+    (
+        'https://www.youtube.com/s/player/010fbc8d/player_es5.vflset/en_US/base.js',
+        '0hlOAlqjFszVvF4Z', 'R-H23bZGAsRFTg',
+    ),
+    (
+        'https://www.youtube.com/s/player/010fbc8d/player_es6.vflset/en_US/base.js',
+        '0hlOAlqjFszVvF4Z', 'R-H23bZGAsRFTg',
+    ),
 ]
 
 
diff --git a/yt_dlp/extractor/youtube/_video.py b/yt_dlp/extractor/youtube/_video.py
index 9ff727657..14582c5f9 100644
--- a/yt_dlp/extractor/youtube/_video.py
+++ b/yt_dlp/extractor/youtube/_video.py
@@ -1817,6 +1817,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
     _PLAYER_JS_VARIANT_MAP = {
         'main': 'player_ias.vflset/en_US/base.js',
         'tce': 'player_ias_tce.vflset/en_US/base.js',
+        'es5': 'player_es5.vflset/en_US/base.js',
+        'es6': 'player_es6.vflset/en_US/base.js',
         'tv': 'tv-player-ias.vflset/tv-player-ias.js',
         'tv_es6': 'tv-player-es6.vflset/tv-player-es6.js',
         'phone': 'player-plasma-ias-phone-en_US.vflset/base.js',