diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 9b0016d07..c54406e7a 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -3128,7 +3128,8 @@ class InfoExtractor(object):
                 continue
             urls.add(source_url)
             source_type = source.get('type') or ''
-            ext = mimetype2ext(source_type) or determine_ext(source_url)
+            # https://github.com/yt-dlp/yt-dlp/pull/10956
+            ext = determine_ext(source_url, default_ext=mimetype2ext(source_type))
             if source_type == 'hls' or ext == 'm3u8' or 'format=m3u8-aapl' in source_url:
                 formats.extend(self._extract_m3u8_formats(
                     source_url, video_id, 'mp4', entry_protocol='m3u8_native',
diff --git a/youtube_dl/extractor/hentaistigma.py b/youtube_dl/extractor/hentaistigma.py
index 86a93de4d..c01fe05fd 100644
--- a/youtube_dl/extractor/hentaistigma.py
+++ b/youtube_dl/extractor/hentaistigma.py
@@ -1,6 +1,11 @@
+# coding: utf-8
 from __future__ import unicode_literals
 
 from .common import InfoExtractor
+from ..utils import (
+    merge_dicts,
+    traverse_obj,
+)
 
 
 class HentaiStigmaIE(InfoExtractor):
@@ -24,16 +29,17 @@ class HentaiStigmaIE(InfoExtractor):
         title = self._html_search_regex(
             r'<h2[^>]+class="posttitle"[^>]*><a[^>]*>([^<]+)</a>',
             webpage, 'title')
-        wrap_url = self._html_search_regex(
+
+        wrap_url = self._search_regex(
             r'<iframe[^>]+src="([^"]+mp4)"', webpage, 'wrapper url')
-        wrap_webpage = self._download_webpage(wrap_url, video_id)
 
-        video_url = self._html_search_regex(
-            r'file\s*:\s*"([^"]+)"', wrap_webpage, 'video url')
+        vid_page = self._download_webpage(wrap_url, video_id)
 
-        return {
+        entries = self._parse_html5_media_entries(wrap_url, vid_page, video_id)
+        self._sort_formats(traverse_obj(entries, (0, 'formats')) or [])
+
+        return merge_dicts({
             'id': video_id,
-            'url': video_url,
             'title': title,
             'age_limit': 18,
-        }
+        }, entries[0])
diff --git a/youtube_dl/extractor/kaltura.py b/youtube_dl/extractor/kaltura.py
index 6d4d93394..861b6952b 100644
--- a/youtube_dl/extractor/kaltura.py
+++ b/youtube_dl/extractor/kaltura.py
@@ -23,7 +23,7 @@ class KalturaIE(InfoExtractor):
                 (?:
                     kaltura:(?P<partner_id>\d+):(?P<id>[0-9a-z_]+)|
                     https?://
-                        (:?(?:www|cdnapi(?:sec)?)\.)?kaltura\.com(?::\d+)?/
+                        (?:(?:www|cdnapi(?:sec)?)\.)?kaltura\.com(?::\d+)?/
                         (?:
                             (?:
                                 # flash player
diff --git a/youtube_dl/extractor/mgoon.py b/youtube_dl/extractor/mgoon.py
index 7bb473900..56086f7b9 100644
--- a/youtube_dl/extractor/mgoon.py
+++ b/youtube_dl/extractor/mgoon.py
@@ -13,7 +13,7 @@ from ..utils import (
 
 class MgoonIE(InfoExtractor):
     _VALID_URL = r'''(?x)https?://(?:www\.)?
-    (?:(:?m\.)?mgoon\.com/(?:ch/(?:.+)/v|play/view)|
+    (?:(?:m\.)?mgoon\.com/(?:ch/(?:.+)/v|play/view)|
         video\.mgoon\.com)/(?P<id>[0-9]+)'''
     _API_URL = 'http://mpos.mgoon.com/player/video?id={0:}'
     _TESTS = [
diff --git a/youtube_dl/extractor/orf.py b/youtube_dl/extractor/orf.py
index 1ee78edbc..2e1341f44 100644
--- a/youtube_dl/extractor/orf.py
+++ b/youtube_dl/extractor/orf.py
@@ -112,7 +112,7 @@ class ORFRadioIE(ORFRadioBase):
 
     _VALID_URL = (
         r'https?://sound\.orf\.at/radio/(?P<station>{0})/sendung/(?P<id>\d+)(?:/(?P<show>\w+))?'.format(_STATION_RE),
-        r'https?://(?P<station>{0})\.orf\.at/player/(?P<date>\d{{8}})/(?P<id>\d+)'.format(_STATION_RE),
+        r'https?://(?P<station>{0})\.orf\.at/(?:player|programm)/(?P<date>\d{{8}})/(?P<id>\d+)'.format(_STATION_RE),
     )
 
     _TESTS = [{
@@ -150,6 +150,10 @@ class ORFRadioIE(ORFRadioBase):
             'duration': 1500,
         },
         'skip': 'Shows from ORF Sound are only available for 30 days.'
+    }, {
+        # yt-dlp/yt-dlp#11014
+        'url': 'https://oe1.orf.at/programm/20240916/769302/Playgrounds',
+        'only_matching': True,
     }]
 
     def _real_extract(self, url):