Traceback (most recent call last):


 "~/.local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 803, in wrapper

return func(self, *args, **kwargs)


 "~/.local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 824, in __extract_info

ie_result = ie.extract(url)


 "~/.local/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 532, in extract

ie_result = self._real_extract(url)


 "~/.local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 2075, in _real_extract

raise ExtractorError(error_message, expected=True)
youtube_dl.utils.ExtractorError: Video unavailable

Traceback (most recent call last):

 "C:\Python27\Scripts\coursera-dl-script.py", line 9, in <module>
load_entry_point('coursera==0.5.2', 'console_scripts', 'coursera-dl')()

 "c:\python27\lib\site-packages\coursera\coursera_dl.py", line 1056, in main
if download_class(args, class_name):

 "c:\python27\lib\site-packages\coursera\coursera_dl.py", line 1034, in download_class
return download_on_demand_class(args, class_name)

 "c:\python27\lib\site-packages\coursera\coursera_dl.py", line 1015, in download_on_demand_class
args.resume

 "c:\python27\lib\site-packages\coursera\coursera_dl.py", line 528, in download_lectures
downloader.download(url, lecfn, resume=resume)

 "c:\python27\lib\site-packages\coursera\downloaders.py", line 50, in download
self._start_download(url, filename, resume)

 "c:\python27\lib\site-packages\coursera\downloaders.py", line 366, in _start_download
f = open(filename, 'ab') if resume else open(filename, 'wb')IOError: [Errno 22] invalid mode ('wb') or filename: u'probability-intro\01_introduction-to-data\01_designing-studies\01_lesson-learning-objectives_textbook.php?stat_book=os'