Embeded youtube-dl: persist authentication between multiple instances

[brpaz]

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Description of your issue, suggested solution and other information

Hello.
I am working on a simple python script to be able to backup a list of playlists from Youtube.
The problem is that I have to enter the TFA code for every playlist.
Is there any way I can avoid that? I tried enabling the cookies option but its not working. I think this happens because I am creating a new instance of YoutubeDL for each playlist, but I need to do it, so I can override the output template.

This is the snippet of my code:

  for playlist_id, target_path in playlists.iteritems():
      print colored("Downloading  %s to %s ..." % (playlist_id, target_path ), 'yellow')

      ydl_opts['outtmpl'] = os.path.join(target_path, OUTPUT_FILE_PATTERN)

      ydl = youtube_dl.YoutubeDL(ydl_opts)
      ydl.download([YOUTUBE_PLAYLIST_BASE_URL + playlist_id])

It forces me to enter TFA code for each loop iteration.

Any suggestions to overcome this?
It would be nice if I could just changing the outtmpl property without having to create an entire new YoutubeDL object, but I couldnt find any setter method.

[dstftw]

You may use cookiefile. Or simply change outtmpl with ydl.params['outtmpl'] = ....