[Oreilly] Handle new web url (#990)

The change in URL is most likely a server side issue. But we can work around it by a simple substitution

Authored by: MKSherbini

yt_dlp/extractor/safari.py

@@ -193,7 +193,12 @@ class SafariApiIE(SafariBaseIE):
         part = self._download_json(
             url, '%s/%s' % (mobj.group('course_id'), mobj.group('part')),
             'Downloading part JSON')
-        return self.url_result(part['web_url'], SafariIE.ie_key())
+        web_url = part['web_url']
+        if 'library/view' in web_url:
+            web_url = web_url.replace('library/view', 'videos')
+            natural_keys = part['natural_key']
+            web_url = f'{web_url.rsplit("/")[0]}/{natural_keys[0]}-{natural_keys[1][:-5]}'
+        return self.url_result(web_url, SafariIE.ie_key())
 
 
 class SafariCourseIE(SafariBaseIE):