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Re:How TikTok's design makes the algorithm work by hombre_fatal on Tuesday September 22, 2020 @05:01AM (#24552397)
Two potential issues come to mind when I consider your test through the lens of TikTok:

1. There basically isn't content where the content consists solely of the gender/race/age of those in frame and nothing else (outside of fetishism).

2. People who strictly want to only watch that content aren't very common (outside of fetishism).

So it makes sense why your cohort might not show up on a website that has a much more intolerant stance on NSFW content than Youtube and Instagram.

If we're to believe that TikTok only recommends videos that have been human-tagged (claimed in TFA and in these comments), then it seems even more likely that a video of (your example) east asian women aged 20-35 dancing to music are tagged "dancing", (e.g.) "kpop" and not "east asian" "women" "20-35". And your feed of "dancing" + "kpop" recommendations only incidentally contain the demographic you seek while being oblivious to it.

Just guessing, of course. I have a kneejerk charity response for something when someone on HN says that it's absurdly bad. ;) If only I had this reflex at all times.

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