In the 1980's, Canadian broadcaster Global found a loophole in Canadian broadcasting legislation.
Instead of broadcasting test patterns on screen and losing out on overnight revenue, they could send a cameraman into the city to walk around and film the streets of Toronto.
Global producers decided to create their own original music to accompany the show instead of losing out on licensing fees.
Because the show was entirely "Canadian Content", this allowed Global to leave key primetime slots open to broadcast American content.
The show was called Night Walk.
Although Night Walk was created to exploit a loophole, the footage that was left behind now looks like a time capsule.
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Ozzy Osbourne's music has been heard thundering out across Birmingham as fans pulled up to the Black Sabbath mural with a truck-mounted video screen and speakers.
Birmingham paying their respects to one of their own 🖤