It sounds as if the authority announcement has been edited out of this. It would have been at about 30 seconds in, with a long timpani roll behind it. "This is Yorkshire Television broadcasting from the Emley Moor transmitter of the Independent Television Authority."
Never just Emley Moor. Emley Moor and Scarborough, until 22 March 1969, then Emley, Moor, Scarborough and Sheffield, until at least 14 November 1969 if not longer. Exact wording unclear until 1 January 1974, when it was Emley Moor, Belmont and associated.
