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A comment on Continuing our work to improve recommendations on YouTube. Parent comment

Re:Continuing our work to improve recommendations on YouTube by rasz on Friday January 25, 2019 @05:28PM (#19003201)
user agent hits Google random-string.googlevideo.com/videoplayback with referrer, ip, signature and several other parameters coding your individual user id, Google knows every single time who, why and when requested particular resource.
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Re:Continuing our work to improve recommendations on YouTube by oh_sigh on Friday January 25, 2019 @08:24PM (#19004105)
Just because they have the data doesn't necessarily mean that they use it. They might rely on some javascript XHR to tell them when a video is really watched. Just guessing here.
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