>>/30237/
> couldn't determine the date

Endchan MD5 filenames, I checked my early thread scrapes:
> 659e979db33bc5cef248df799465fc18-videomp4.mp4

 >>/1627/
> 7fef8436b7f5d71e70be21c342a69de1-videomp4.mp4

 >>/6836/
> marky is hanging out with a man

Her brother, Hunter (^:

It didn't cross my mind to expect these files to have original upload dates (not in a way I've seen yt-dlp handle them), and can confirm that original farm tour video in that folder was indeed sourced from same re-upload. And for whatever reason creation time is precise up to seconds (unknown time zone), e.g. exiftool shows the following:
> File Name: marky-s tour of the farm.mp4

> Media Create Date: 2020:03:31 07:21:46


NB: filming must have taken place around Christmas 2018, Marky talks about shipping her bikes to Brazil.

Here are the dates for files in alice mir streams folder then:
irl was fun 3$ tts 15$ firesale.mp4
2021:11:15 11:14:07
just horsin’ around tts $3 firesales $15 - first.mp4
2021:11:14 01:52:19
just horsin’ around tts $3 firesales $15 - last.mp4
2021:11:15 02:01:25
just horsin’ around tts $3 firesales $15 - middle.mp4
2021:11:14 14:27:29
mir stream takeover 3$ tts 10$ firesale.mp4
2021:11:15 07:04:25
Newport Rhode Island tts $3 firesales $15.mp4
2021:11:15 00:07:47
Newport Rhode Island tts $3.mp4
2021:11:15 04:52:57
visual novel stream ft. mir.mp4
2021:11:13 09:11:22

For reasons unknown first mega had few filename characters replaced with dashes, e.g. marky-s tour of the farm.mp4 as shown above, stream names had no dollar sign originally or had dash instead (better ask the guy who uploaded them).

Now what's left is to get full instagram archive from someone. And maybe few old twitch streams.