How can I determine the directory that the video will be saved to (or was saved to) via a python script?

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How can I determine the directory that the video will be saved to (or was saved to) via a python script?

I am attempting to download multiple video files, but also want to save some of the meta data that is provided by extract_info to a separate file which is stored with the video file. My script to download looks like this:

import youtube_dl

ydl_opts = {
        'retrictfilenames': True,
        'outtmpl': "%(title)s-%(id)s/%(title)s-%(id)s-%(resolution)s.%(ext)s"
    }

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    link = 'https://www.youtube.com/watch?v=BaW_jenozKc'
    ydl.download([link])
    meta = ydl.extract_info(link, download=False)

At this point, I'd like to write specific values from meta to a file in the %(title)s-%(id)s directory specified in ydl_opts. I'd do this with something like the following immediately after the meta = ydl.extract_info(...) line above:

with open("<DIRECTORY>/metadata.txt", "w") as f:
    # write values

How do I specify the value of <DIRECTORY> to be in the with open line? I just need the know how to access the value that ydl_opts['outtmpl'] becomes. I can parse the directory out on my own.

[dstftw]

ydl.params['outtmpl'] = '"%(title)s-%(id)s/metadata.txt'
with open(ydl.prepare_filename(info) ...
   ...