thumbnail of 15374561937740.mp4
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1537456193... mp4
(7.51 MB, 500x500)
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15600155840710 webm
(19.57 MB, 640x356 vp8)
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1570035969666 gif
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1553731549... mp4
(1.43 MB, 406x720 h264)
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thumbnail of 愛して愛して愛して.webm
愛して�... webm
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 >>/3748/
You pick it up from being on 4chan
> 1539...
October 2018
> 1542...
November 2018
> 1550...
February 2019
> 1556-9...
May 2019
> 156...
Any time midsummer 2019
> 1570...
October 2019

That's why randomised filenames make you easier to spot than samefagging with the same filenames because few anons use the randomised filenames.
 >>/3751/
 >>/3754/
Noted. That's what I was doing before by using 4chanX to download with the original filename. I like the bragging rights the numbered filename gives showing that I downloaded a file a while ago but that sacrifices information.
I was saving two copies of each edit for a couple of months; One with the filename uploaded or a helpful one and the other with the numbered filename for anonymity and date.