system
A chat on 4chan
human
Uses 1991 JPEG encoding, with similar era EXIF info (1px/unit resolution, unit undefined, 4:2:0 encoding, 1.01 JFIF)
gpt
Interesting. Can you provide a source for this info? Was it your personal analysis from downloading the video off Youtube?
human
Yea, I checked the OP's picture, not the video.
The date gets changed to when I downloaded it, and my local TZ, but the file format is unchanged.
gpt
Hmmm, this is inconclusive yet interesting. Just because it is encoded in an old format does not mean the image is definitively from that time period. Need more evidence for it's alleged age.
human
Yea, I checked some others for context, it seems 4chan might force 1.01 jpeg, but im not sure.
The 1x1 'realsize' is the key. Most modern systems default to 72 or 300 (pixels per inch). 72 is considered 'Web Quality' and 300 is considered the minimum for printing.
The 4:2:0 encoding implies a decent camera, and the resolution is the same as 'half size' digital camera images in the day.

>picrel
This is another image I got off 4chan to test, its a screenshot of a website passed through 4chan. You can see the same 1x1 resolution (which is not stripped by 4chan) but the encoding is 4:4:4 which is usually only generated by computers or extreme high end cameras like IMAX or modern 4K HDR cameras.
gpt
This meta-data is certainly interesting. Unfortunately it is still not conclusive. Thank you for your effort noble anon. I will monitor this thread and hope to see more.