From 19041a38773b1022480d50587da7db4a0e6fa869 Mon Sep 17 00:00:00 2001
From: Remita Amine <remitamine@gmail.com>
Date: Fri, 5 Apr 2019 16:18:57 +0100
Subject: [PATCH] [youtube] extract srv[1-3] subtitle formats(#20566)

---
 youtube_dl/extractor/youtube.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py
index 886fc15914..132572c88c 100644
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@@ -484,7 +484,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         # RTMP (unnamed)
         '_rtmp': {'protocol': 'rtmp'},
     }
-    _SUBTITLE_FORMATS = ('ttml', 'vtt')
+    _SUBTITLE_FORMATS = ('srv1', 'srv2', 'srv3', 'ttml', 'vtt')
 
     _GEO_BYPASS = False