0:25 - a young Sarah Polley in the short-lived "Ramona" TV series, based on Beverly Cleary's books (made in Canada). And speaking of Canada, OT but I REALLY wish the anime "Anne of Green Gables" series had been dubbed for the U.S./Anglophone Canada. It would have been PERFECT on PBS.
I remember pulling in Mississippi ETV Network with my rabbit ears when I lived in western Alabama. They use to go through all the stations giving there power output frequency and tower location then had the flag evolution SSB. There sign off lasted like 10 minutes. Like APT I use to watch Dr. Who on Mississippi Educational Network on Saturday nights.
GIven the way these are done, I suppose the separate transmitter sites probably have some sort of local audio recording of the station ID that would be automatically played when those moments pop up in the feed.