Lots of ways. If the video was watched via phone app, phone number can be collected directly. If logged into a google account on the device that viewed the video, google had the number already. Could also be from matching internet traffic over a shared IP, device with a known phone number pinged google through house’s WIFI, another device on the same WIFI watched the YouTube video.
how the fuck do they get your phone number just from you watching a video???
Lots of ways. If the video was watched via phone app, phone number can be collected directly. If logged into a google account on the device that viewed the video, google had the number already. Could also be from matching internet traffic over a shared IP, device with a known phone number pinged google through house’s WIFI, another device on the same WIFI watched the YouTube video.