Places   (Help with places, streets and buildings in Wigan.)

Tonker, I don't think that channel is an official St Helens history channel or is an official St Helens anything channel, it's just some random youtube channel with that title, the other videos on that channel are just random videos of the town. So it's unlikely the person had anything to do with the footage, but they must've got the footage from somewhere. As you say, you think you've seen the footage before.