I agree that if Google is getting the content for free they should, at least try, to keep it ad free for the consumer. But I don’t know if Google has to pay licensing for stuff like PBS. PBS does technically have ads, but they are unobtrusive, shown at the beginning or end of a show and are presented as “Brought to you by….” Less of an ad and more recognition that a company has paid to support bringing PBS to you for free.
I’ve never uses this service, so I’m not aware of how they might insert ads either. Between shows? Typical ad-breaks times every 8.5 minutes of broadcast time? More?
An old fashioned meme but it checks out