I notice it every time I'm linked to a news story that's only in a video format. I'm literate, thanks, I don't need an announcer slowly explaining things to me.
My guess is that it's better for advertising because they can show you ads that cannot be skipped before getting to the content.
My various problems with online video mean there's a lot of content from which I'm essentially cut off unless I want to put forth a special effort, and such effort is usually (though not always) not worth it.