Advertiser have no less of an idea who watches videos on YT than they do on TV. Advertisers choose their slot on TV. They also choose their demographic on YouT

Advertiser have no less of an idea who watches videos on YT than they do on TV. Advertisers choose their slot on TV. They also choose their demographic on YouTube (it’s called “targeted advertising”). Hence why you’re more likely to get ads about tech products on a tech video vs a music video.