diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py
index 080d682eb..6b5252280 100644
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@@ -909,7 +909,7 @@ class InfoExtractor:
             dump = base64.b64encode(webpage_bytes).decode('ascii')
             self._downloader.to_screen(dump)
         if self.get_param('write_pages'):
-            filename = self._request_dump_filename(video_id, urlh.geturl())
+            filename = self._request_dump_filename(urlh.geturl(), video_id)
             self.to_screen(f'Saving request to {filename}')
             with open(filename, 'wb') as outf:
                 outf.write(webpage_bytes)
@@ -940,7 +940,7 @@ class InfoExtractor:
             if fatal:
                 raise ExtractorError(errmsg, cause=ve)
             else:
-                self.report_warning(errmsg + str(ve))
+                self.report_warning(f'{errmsg}: {ve}')
 
     def _parse_socket_response_as_json(self, data, video_id, transform_source=None, fatal=True):
         return self._parse_json(
diff --git a/yt_dlp/extractor/openload.py b/yt_dlp/extractor/openload.py
index d987cd927..22d7e1a84 100644
--- a/yt_dlp/extractor/openload.py
+++ b/yt_dlp/extractor/openload.py
@@ -216,10 +216,10 @@ class PhantomJSwrapper:
             [self.exe, '--ssl-protocol=any', self._TMP_FILES['script'].name],
             text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
         if returncode:
-            raise ExtractorError(f'Executing JS failed\n:{stderr}')
+            raise ExtractorError(f'Executing JS failed:\n{stderr}')
         with open(self._TMP_FILES['html'].name, 'rb') as f:
             html = f.read().decode('utf-8')
 
         self._load_cookies()
 
-        return (html, stdout)
+        return html, stdout
diff --git a/yt_dlp/postprocessor/ffmpeg.py b/yt_dlp/postprocessor/ffmpeg.py
index 71ae16b51..0c8d4611d 100644
--- a/yt_dlp/postprocessor/ffmpeg.py
+++ b/yt_dlp/postprocessor/ffmpeg.py
@@ -239,7 +239,8 @@ class FFmpegPostProcessor(PostProcessor):
                     encodeArgument('-i')]
             cmd.append(encodeFilename(self._ffmpeg_filename_argument(path), True))
             self.write_debug(f'{self.basename} command line: {shell_quote(cmd)}')
-            stdout, stderr, returncode = Popen.run(cmd, text=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+            stdout, stderr, returncode = Popen.run(
+                cmd, text=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
             if returncode != (0 if self.probe_available else 1):
                 return None
         except OSError:
@@ -343,7 +344,8 @@ class FFmpegPostProcessor(PostProcessor):
                 for i, (path, opts) in enumerate(path_opts) if path)
 
         self.write_debug('ffmpeg command line: %s' % shell_quote(cmd))
-        stdout, stderr, returncode = Popen.run(cmd, text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
+        _, stderr, returncode = Popen.run(
+            cmd, text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
         if returncode not in variadic(expected_retcodes):
             raise FFmpegPostProcessorError(stderr.strip().splitlines()[-1])
         for out_path, _ in output_path_opts:
diff --git a/yt_dlp/utils.py b/yt_dlp/utils.py
index 8dda5e931..4a519e4e0 100644
--- a/yt_dlp/utils.py
+++ b/yt_dlp/utils.py
@@ -4954,7 +4954,7 @@ def write_xattr(path, key, value):
     try:
         _, stderr, returncode = Popen.run(
             [exe, '-w', key, value, path] if exe == 'xattr' else [exe, '-n', key, '-v', value, path],
-            stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
+            text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
     except OSError as e:
         raise XAttrMetadataError(e.errno, e.strerror)
     if returncode: