Provide opening frame for film (5)

I believe the answer is:

video

I'm a little stuck... Click here to teach me more about this clue!

'for film' is the definition.
(I've seen this before)

'provide opening frame' is the wordplay.
'VIDEO' is hidden in amongst the letters.
However, I'm unsure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for video that I've seen before include "Record footage" , "Who killed the radio star? (5)" , "Film recording" , "(Tape for) recorder of film etc" , "TV/film cassette" .)

I've seen this clue in The Irish Times.

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