Perfect ending to "King Kong," as on old-fashioned video (4)

I believe the answer is:

tape

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'on old-fashioned video' is the definition.
'tape' can be an answer for 'video' (video tape). I'm not certain of the 'on old-fashioned' bit.

'perfect ending to king kong' is the wordplay.
'ending' indicates one should take the final letters (the ending of the word).
'to king kong' becomes 'ape' (I've seen this in another clue).
The last letter of 'perfect' is 't'.
't'+'ape'='TAPE'

'as' is the link.

Can you help me to learn more?

(Other definitions for tape that I've seen before include "Magnetic recording medium; measuring strip" , "Record; material strip" , "Common medium for recording" , "Video recording" , "Measure" .)

I've seen this clue in the Evening Standard.

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