diff --git a/yt_dlp/extractor/jwplatform.py b/yt_dlp/extractor/jwplatform.py
index c949689430..bc47aa6d3f 100644
--- a/yt_dlp/extractor/jwplatform.py
+++ b/yt_dlp/extractor/jwplatform.py
@@ -8,14 +8,16 @@ class JWPlatformIE(InfoExtractor):
     _VALID_URL = r'(?:https?://(?:content\.jwplatform|cdn\.jwplayer)\.com/(?:(?:feed|player|thumb|preview|manifest)s|jw6|v2/media)/|jwplatform:)(?P<id>[a-zA-Z0-9]{8})'
     _TESTS = [{
         'url': 'http://content.jwplatform.com/players/nPripu9l-ALJ3XQCI.js',
-        'md5': 'fa8899fa601eb7c83a64e9d568bdf325',
+        'md5': '3aa16e4f6860e6e78b7df5829519aed3',
         'info_dict': {
             'id': 'nPripu9l',
-            'ext': 'mov',
+            'ext': 'mp4',
             'title': 'Big Buck Bunny Trailer',
             'description': 'Big Buck Bunny is a short animated film by the Blender Institute. It is made using free and open source software.',
             'upload_date': '20081127',
             'timestamp': 1227796140,
+            'duration': 32.0,
+            'thumbnail': 'https://cdn.jwplayer.com/v2/media/nPripu9l/poster.jpg?width=720',
         }
     }, {
         'url': 'https://cdn.jwplayer.com/players/nPripu9l-ALJ3XQCI.js',
@@ -37,18 +39,31 @@ class JWPlatformIE(InfoExtractor):
         },
     }, {
         # Player url not surrounded by quotes
-        'url': 'https://www.deutsche-kinemathek.de/en/online/streaming/darling-berlin',
+        'url': 'https://www.deutsche-kinemathek.de/en/online/streaming/school-trip',
         'info_dict': {
-            'id': 'R10NQdhY',
-            'title': 'Playgirl',
+            'id': 'jUxh5uin',
+            'title': 'Klassenfahrt',
             'ext': 'mp4',
-            'upload_date': '20220624',
-            'thumbnail': 'https://cdn.jwplayer.com/v2/media/R10NQdhY/poster.jpg?width=720',
-            'timestamp': 1656064800,
-            'description': 'BRD 1966, Will Tremper',
-            'duration': 5146.0,
+            'upload_date': '20230109',
+            'thumbnail': 'https://cdn.jwplayer.com/v2/media/jUxh5uin/poster.jpg?width=720',
+            'timestamp': 1673270298,
+            'description': '',
+            'duration': 5193.0,
         },
         'params': {'allowed_extractors': ['generic', 'jwplatform']},
+    }, {
+        # iframe src attribute includes backslash before URL string
+        'url': 'https://www.elespectador.com/colombia/video-asi-se-evito-la-fuga-de-john-poulos-presunto-feminicida-de-valentina-trespalacios-explicacion',
+        'info_dict': {
+            'id': 'QD3gsexj',
+            'title': 'Así se evitó la fuga de John Poulos, presunto feminicida de Valentina Trespalacios',
+            'ext': 'mp4',
+            'upload_date': '20230127',
+            'thumbnail': 'https://cdn.jwplayer.com/v2/media/QD3gsexj/poster.jpg?width=720',
+            'timestamp': 1674862986,
+            'description': 'md5:128fd74591c4e1fc2da598c5cb6f5ce4',
+            'duration': 263.0,
+        },
     }]
 
     @classmethod
@@ -57,7 +72,7 @@ class JWPlatformIE(InfoExtractor):
             # <input value=URL> is used by hyland.com
             # if we find <iframe>, dont look for <input>
             ret = re.findall(
-                r'<%s[^>]+?%s=["\']?((?:https?:)?//(?:content\.jwplatform|cdn\.jwplayer)\.com/players/[a-zA-Z0-9]{8})' % (tag, key),
+                r'<%s[^>]+?%s=\\?["\']?((?:https?:)?//(?:content\.jwplatform|cdn\.jwplayer)\.com/players/[a-zA-Z0-9]{8})' % (tag, key),
                 webpage)
             if ret:
                 return ret