diff --git a/yt_dlp/YoutubeDL.py b/yt_dlp/YoutubeDL.py
index 3293a9076..d589db562 100644
--- a/yt_dlp/YoutubeDL.py
+++ b/yt_dlp/YoutubeDL.py
@@ -5,6 +5,7 @@
 import errno
 import fileinput
 import functools
+import hashlib
 import http.cookiejar
 import io
 import itertools
@@ -4425,3 +4426,20 @@ def _write_thumbnails(self, label, info_dict, filename, thumb_filename_base=None
             if ret and not write_all:
                 break
         return ret
+
+    def _request_dump_filename(self, url, video_id, data=None):
+        if data is not None:
+            data = hashlib.md5(data).hexdigest()
+        basen = join_nonempty(video_id, data, url, delim='_')
+        trim_length = self.params.get('trim_file_name') or 240
+        if len(basen) > trim_length:
+            h = '___' + hashlib.md5(basen.encode()).hexdigest()
+            basen = basen[:trim_length - len(h)] + h
+        filename = sanitize_filename(f'{basen}.dump', restricted=True)
+        # Working around MAX_PATH limitation on Windows (see
+        # http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx)
+        if os.name == 'nt':
+            absfilepath = os.path.abspath(filename)
+            if len(absfilepath) > 259:
+                filename = fR'\\?\{absfilepath}'
+        return filename
diff --git a/yt_dlp/downloader/hls.py b/yt_dlp/downloader/hls.py
index 7a47f8f83..1e9ab911f 100644
--- a/yt_dlp/downloader/hls.py
+++ b/yt_dlp/downloader/hls.py
@@ -80,7 +80,13 @@ def real_download(self, filename, info_dict):
             self.to_screen(f'[{self.FD_NAME}] Downloading m3u8 manifest')
             urlh = self.ydl.urlopen(self._prepare_url(info_dict, man_url))
             man_url = urlh.url
-            s = urlh.read().decode('utf-8', 'ignore')
+            s_bytes = urlh.read()
+            if self.params.get('write_pages'):
+                dump_filename = self.ydl._request_dump_filename(man_url, info_dict['id'], None)
+                self.to_screen(f'[{self.FD_NAME}] Saving request to {dump_filename}')
+                with open(dump_filename, 'wb') as outf:
+                    outf.write(s_bytes)
+            s = s_bytes.decode('utf-8', 'ignore')
 
         can_download, message = self.can_download(s, info_dict, self.params.get('allow_unplayable_formats')), None
         if can_download:
diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py
index 3e7734ce1..a809537c4 100644
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@@ -2,7 +2,6 @@
 import collections
 import functools
 import getpass
-import hashlib
 import http.client
 import http.cookiejar
 import http.cookies
@@ -78,7 +77,6 @@
     parse_iso8601,
     parse_m3u8_attributes,
     parse_resolution,
-    sanitize_filename,
     sanitize_url,
     smuggle_url,
     str_or_none,
@@ -1022,23 +1020,6 @@ def __check_blocked(self, content):
                 'Visit http://blocklist.rkn.gov.ru/ for a block reason.',
                 expected=True)
 
-    def _request_dump_filename(self, url, video_id, data=None):
-        if data is not None:
-            data = hashlib.md5(data).hexdigest()
-        basen = join_nonempty(video_id, data, url, delim='_')
-        trim_length = self.get_param('trim_file_name') or 240
-        if len(basen) > trim_length:
-            h = '___' + hashlib.md5(basen.encode()).hexdigest()
-            basen = basen[:trim_length - len(h)] + h
-        filename = sanitize_filename(f'{basen}.dump', restricted=True)
-        # Working around MAX_PATH limitation on Windows (see
-        # http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx)
-        if os.name == 'nt':
-            absfilepath = os.path.abspath(filename)
-            if len(absfilepath) > 259:
-                filename = fR'\\?\{absfilepath}'
-        return filename
-
     def __decode_webpage(self, webpage_bytes, encoding, headers):
         if not encoding:
             encoding = self._guess_encoding_from_content(headers.get('Content-Type', ''), webpage_bytes)
@@ -1067,7 +1048,7 @@ def _webpage_read_content(self, urlh, url_or_request, video_id, note=None, errno
         if self.get_param('write_pages'):
             if isinstance(url_or_request, Request):
                 data = self._create_request(url_or_request, data).data
-            filename = self._request_dump_filename(urlh.url, video_id, data)
+            filename = self._downloader._request_dump_filename(urlh.url, video_id, data)
             self.to_screen(f'Saving request to {filename}')
             with open(filename, 'wb') as outf:
                 outf.write(webpage_bytes)
@@ -1128,7 +1109,8 @@ def download_content(self, url_or_request, video_id, note=note, errnote=errnote,
                              impersonate=None, require_impersonation=False):
             if self.get_param('load_pages'):
                 url_or_request = self._create_request(url_or_request, data, headers, query)
-                filename = self._request_dump_filename(url_or_request.url, video_id, url_or_request.data)
+                filename = self._downloader._request_dump_filename(
+                    url_or_request.url, video_id, url_or_request.data)
                 self.to_screen(f'Loading request from {filename}')
                 try:
                     with open(filename, 'rb') as dumpf: