"no-mtime" option missing in ydl_opts for python?

[CyanSlinky]

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Question

I want "Date Modified" to be the time i downloaded the video and not the time it was uploaded.
If i understand correctly then "no-mtime" is supposed to do this?
but i'm using python and ydl_opts so i can't do --no-mtime as far as i know?

I searched through all available options here but couldn't find "no-mtime" or anything similar.

Here's my ydl_opts, i've tried every variation i could think of for "no-mtime" separately and together, but nothing seems to change the timestamp to the time of download instead of upload. Although it does seem to be the time of download while it's downloading but as soon as it's done it changes it to the time of upload.

ydl_opts = {
        'ignoreerrors': True, 
        'format': 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best',
        'merge-output-format': True,
        'outtmpl': output_template, #'quiet': True, 'no_warnings': True
        'nomtime': True,
        'no-mtime': True,
        'no_mtime': True
    }

[s104346]

What you are looking for is updatetime:

youtube-dl/youtube_dl/YoutubeDL.py

Lines 302 to 307 in 0c15a56

	The following parameters are not used by YoutubeDL itself, they are used by
	the downloader (see youtube_dl/downloader/common.py):
	nopart, updatetime, buffersize, ratelimit, min_filesize, max_filesize, test,
	noresizebuffer, retries, continuedl, noprogress, consoletitle,
	xattr_set_filesize, external_downloader_args, hls_use_mpegts,
	http_chunk_size.

youtube-dl/youtube_dl/downloader/common.py

Line 43 in 0c15a56

updatetime: Use the Last-modified header to set output file timestamps.