From 70f8babcafcace23d8d1b6dc4de6dfb417216212 Mon Sep 17 00:00:00 2001
From: ilpersi <lpersichetti@gmail.com>
Date: Wed, 30 Sep 2020 13:31:46 +0200
Subject: [PATCH] Fix teachable URL validation

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

diff --git a/youtube_dl/extractor/teachable.py b/youtube_dl/extractor/teachable.py
index a75369dbe..527d484e7 100644
--- a/youtube_dl/extractor/teachable.py
+++ b/youtube_dl/extractor/teachable.py
@@ -140,7 +140,7 @@ class TeachableIE(TeachableBaseIE):
     @staticmethod
     def _is_teachable(webpage):
         return 'teachableTracker.linker:autoLink' in webpage and re.search(
-            r'<link[^>]+href=["\']https?://process\.fs\.teachablecdn\.com',
+            r'<img[^>]+src=["\']https?://process\.fs\.teachablecdn\.com',
             webpage)
 
     @staticmethod