[ie/generic] Impersonate browser by default (#11206)

Also adds `impersonate` extractor arg

Authored by: Grub4K

yt_dlp/extractor/generic.py

@@ -8,6 +8,7 @@ from .common import InfoExtractor
 from .commonprotocols import RtmpIE
 from .youtube import YoutubeIE
 from ..compat import compat_etree_fromstring
+from ..networking.impersonate import ImpersonateTarget
 from ..utils import (
     KNOWN_EXTENSIONS,
     MEDIA_EXTENSIONS,
@@ -2373,6 +2374,12 @@ class GenericIE(InfoExtractor):
         else:
             video_id = self._generic_id(url)
 
+        # Try to impersonate a web-browser by default if possible
+        # Skip impersonation if not available to omit the warning
+        impersonate = self._configuration_arg('impersonate', [''])
+        if 'false' in impersonate or not self._downloader._impersonate_target_available(ImpersonateTarget()):
+            impersonate = None
+
         # Some webservers may serve compressed content of rather big size (e.g. gzipped flac)
         # making it impossible to download only chunk of the file (yet we need only 512kB to
         # test whether it's HTML or not). According to yt-dlp default Accept-Encoding
@@ -2384,7 +2391,7 @@ class GenericIE(InfoExtractor):
         full_response = self._request_webpage(url, video_id, headers=filter_dict({
             'Accept-Encoding': 'identity',
             'Referer': smuggled_data.get('referer'),
-        }))
+        }), impersonate=impersonate)
         new_url = full_response.url
         if new_url != extract_basic_auth(url)[0]:
             self.report_following_redirect(new_url)