Some Other Guy
This a very interesting tape which, regrettably, I have no specific info about.
It can be assumed the recording is one of the
22 August 1962 or 5 September 1962 Cavern performances. A possible assumption is that it's the 5 September recording since that was
an audio recording.
However, a friend of TheBeatleSource
provided the following info:
"I think this is the tape that was made
sometime in the 1970's (1973?) and is, as I am led to believe, when the original film was damaged, resulting in the glitch and audio stretch that in turn led Granada to insert the
clip to cover the damage in the original film."
See details of the Granada Television recordings here and here