diff --git a/yt_dlp/extractor/dreisat.py b/yt_dlp/extractor/dreisat.py
index cf2f13d158..3b1a720d77 100644
--- a/yt_dlp/extractor/dreisat.py
+++ b/yt_dlp/extractor/dreisat.py
@@ -27,7 +27,7 @@ class DreiSatIE(ZDFBaseIE):
         },
     }, {
         'url': 'https://www.3sat.de/film/ab-18/ab-18---mein-fremdes-ich-100.html',
-        'md5': '66cb9013ce37f6e008dc99bfcf1356bc',
+        'md5': 'f92638413a11d759bdae95c9d8ec165c',
         'info_dict': {
             'id': '221128_mein_fremdes_ich2_ab18',
             'ext': 'mp4',
@@ -42,7 +42,7 @@ class DreiSatIE(ZDFBaseIE):
         },
     }, {
         'url': 'https://www.3sat.de/gesellschaft/37-grad-leben/aus-dem-leben-gerissen-102.html',
-        'md5': '69f276184c9a24147e4baae728fbc3c4',
+        'md5': 'a903eaf8d1fd635bd3317cd2ad87ec84',
         'info_dict': {
             'id': '250323_0903_sendung_sgl',
             'ext': 'mp4',
@@ -58,7 +58,7 @@ class DreiSatIE(ZDFBaseIE):
     }, {
         # Video with chapters
         'url': 'https://www.3sat.de/kultur/buchmesse/dein-buch-das-beste-von-der-leipziger-buchmesse-2025-teil-1-100.html',
-        'md5': '65e8f365799d2266c9110d83d748445e',
+        'md5': '6b95790ce52e75f0d050adcdd2711ee6',
         'info_dict': {
             'id': '250330_dein_buch1_bum',
             'ext': 'mp4',
diff --git a/yt_dlp/extractor/phoenix.py b/yt_dlp/extractor/phoenix.py
index a4e58724cf..c93034df46 100644
--- a/yt_dlp/extractor/phoenix.py
+++ b/yt_dlp/extractor/phoenix.py
@@ -13,7 +13,7 @@ class PhoenixIE(ZDFBaseIE):
     _VALID_URL = r'https?://(?:www\.)?phoenix\.de/(?:[^/?#]+/)*[^/?#&]*-a-(?P<id>\d+)\.html'
     _TESTS = [{
         'url': 'https://www.phoenix.de/sendungen/dokumentationen/spitzbergen-a-893349.html',
-        'md5': '768bbcd67a51fbfb22263ecdbc49146d',
+        'md5': 'a79e86d9774d0b3f2102aff988a0bd32',
         'info_dict': {
             'id': '221215_phx_spitzbergen',
             'ext': 'mp4',
diff --git a/yt_dlp/extractor/zdf.py b/yt_dlp/extractor/zdf.py
index e8d82f6485..631c50de00 100644
--- a/yt_dlp/extractor/zdf.py
+++ b/yt_dlp/extractor/zdf.py
@@ -126,7 +126,6 @@ class ZDFBaseIE(InfoExtractor):
             'duration': duration,
             'formats': formats,
             'subtitles': self._extract_subtitles(src_captions),
-            '_format_sort_fields': ('tbr', 'res', 'quality', 'language_preference'),
         }
 
     def _get_api_token(self, video_id):
@@ -298,7 +297,7 @@ class ZDFIE(ZDFBaseIE):
         # Video with chapters
         # Also: video with sign-language variant
         'url': 'https://www.zdf.de/video/magazine/heute-journal-104/heute-journal-vom-19-12-2021-100',
-        'md5': '1175003f28507bd27b266181c4de9f56',
+        'md5': '6ada39465497a84fb98d48ffff69e7b7',
         'info_dict': {
             'id': 'heute-journal-vom-19-12-2021-100',
             'ext': 'mp4',
@@ -321,7 +320,7 @@ class ZDFIE(ZDFBaseIE):
     }, {
         # Video that requires fallback extraction
         'url': 'https://www.zdf.de/nachrichten/politik/deutschland/koalitionsverhandlungen-spd-cdu-csu-dobrindt-100.html',
-        'md5': '95903ecbd37f2881b4462d074b8f8c44',
+        'md5': 'c3a78514dd993a5781aa3afe50db51e2',
         'info_dict': {
             'id': 'koalitionsverhandlungen-spd-cdu-csu-dobrindt-100',
             'ext': 'mp4',
@@ -376,7 +375,7 @@ class ZDFIE(ZDFBaseIE):
         'url': 'https://www.zdf.de/serien/northern-lights/begegnung-auf-der-bruecke-100.html',
         'info_dict': {
             'id': 'begegnung-auf-der-bruecke-100',
-            'ext': 'mp4',
+            'ext': 'webm',
             'title': 'Begegnung auf der Brücke',
             'description': 'md5:e53a555da87447f7f1207f10353f8e45',
             'duration': 3083.0,