added hotfix to youtube-dl's coub video bug: https://github.com/rg3/youtube-dl/issues/13754

coub-dl.py

@@ -91,6 +91,21 @@ def download_audio_stream(url, file_dict):
 
 @call_verbose(before_message='Downloading video stream... ')
 def download_video_stream(url, file_dict):
+    url = check_output(('youtube-dl',
+                        '--get-url', url)).decode('utf-8').strip()
+
+    curl = Popen(('curl', '--silent',
+                          '--write-out',
+                          '--location',
+                  url),
+                 stdout=PIPE)
+
+    grep = Popen(('grep', '--only-matching', '"http.*"'),
+                 stdin=curl.stdout, stdout=PIPE)
+
+    url = check_output(('sed', 's/muted_//g'),
+                       stdin=grep.stdout).decode('utf-8').strip().strip('"')
+
     call(('youtube-dl', '--ignore-config',
                         '--output', '{}.%(ext)s'.format(file_dict[Stream.VIDEO]),
           url),