Name: YouTubeのアルゴリズムが常に謎に包まれている理由 (Why The YouTube Algorithm Will Always Be A Mystery)
Uploaded: 2021-01-14T10:36:52.000Z
Duration: 4 min 59 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

Back when online video was a different shape,

searching for videos on YouTube relied on…

and YouTube would look at the title and the description and the tags

Keyword stuffing, tag spam, the reply girls of 2012.

If there was any way to guess the YouTube algorithm's priorities,

And desperate video creators changed what they were making

based on rumour, speculation, and extrapolating way too much

So recently, YouTube has just kept quiet.

Their parent company, Google, learned this lesson back when

and connecting to the internet sounded like the screeching of a robot cat:

if Google ever gave a hint about how to boost web sites up their search results,

then there would be a rush of spammers trying to exploit that knowledge.

But now, on YouTube, it's not that the folks who control the algorithm

And here's the evidence: a paper written by YouTube engineers,

explaining they're using Google's research into machine-learning to recommend videos.

That is the same kind of software that creates those weird Deep Dream images,

that makes their text to speech sound so realistic,

and that beat the world's best Go player at his own game.

but machine learning, the way Google does it,

And it gives you outputs: moves it thinks might work.

and then you repeat that process a billion or so times,

But no-one can look inside that black box and see how it works:

it's designed by a computer, for a computer.

And neural networks are great if you're playing a game

with an obvious scoring and points system.

But training that black box on YouTube videos is a bit messier.

It's not just that human behaviour is unpredictable and complicated:

it's trying to work out what counts as winning in the first place.

If YouTube tells the algorithm "show videos that people like",

then it'll kill any channel which talks about politics,

where people hit dislike if they disagree.

And it'll silence anyone who has a small but vocal group

If YouTube tells the algorithm, "okay, show videos that people share",

then videos about private things like medical issues or sex education vanish,

and folks who have a small, loyal, but quiet fanbase

would love the algorithm to recommend only their own videos...

even when the rest of the world doesn't actually want to watch them.

So YouTube started out, according to the paper,

giving their algorithm the reasonable goal of

Because there's no way for a computer to determine quality, or truth.

it can't tell the difference between actual, reliable information

and unhinged, paranoid conspiracy clickbait.

Although, admittedly, neither can a lot of people,

which is why these videos are getting a lot of traction.

between videos that are suitable for children,

and creepy, trademark-infringing unofficial efforts.

It just knows what kids click on and what they watch.

So, sure, the algorithm might increase watch time, in the short term…

but a lot of the videos it recommends are going to be questionable at best

And they're going to be the sort of thing

that advertisers get really nervous about.

All YouTube can do is change the feedback it's getting,

change the signals that say “this is good” or “this is bad”.

If YouTube wanted a human to watch and categorise every video being uploaded

as “safe” or “unsafe” in real time,

they would need about 100,000 employees working shifts round the clock.

Plus, that would expose them to legal issues:

in most of the countries where YouTube has an office,

and then manually step in when you get a complaint,

But if you approve everything with a human in the loop,

and you're opening yourself up to some very expensive lawsuits.

The ideal algorithm, the ideal black box,

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YouTubeのアルゴリズムが常に謎に包まれている理由 (Why The YouTube Algorithm Will Always Be A Mystery)

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perception

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desperate