>>/30101/
I extracted the timestamps from the metadata or other sources and renamed the videos inside mtj-videos mega folder.

[2016-06-10] 25594877.480p.mp4
[2017-10-31] MVI 4447.mp4
[2017-10-31] MVI 6186.mp4
[2019-01-26] 300 subscriberspecial asmr.mp4
[2019-04-01] a story part 1.mp4
[2019-09-13] you hecked yourself for life (= sicko  game over mode ver. 2019 09 13 10 30 19.mp4
[2019-09-13] haiselnet-20190913-0004.mp4
[2019] qna part 1.mp4
[2020-03-31] marky's tour of the farm [RfVsriY5QaM].webm
[2020-10-19] 2013 sadie.mp4
[2020-12-01] VID 39970414 171013 145.mp4
[2021-01-28] MVI 4325.mp4
[2021-04-05] past few years.mp4
[2021-12-02] December 2- 2021.mp4
[2021] 261893113_635851110757676_1987588646007113379_n.mp4

1) I couldn't determine the date of these 2 files:
7fef8436b7f5d71e70be21c342a69de1-videomp4.mp4
659e979db33bc5cef248df799465fc18-videomp4.mp4

Can anyone say or guess at least the year?

2) In the video '[2021-04-05] past few years.mp4' marky is hanging out with a man. You can hear him talking at 02:26. Could that be Katelynn?