Netflix's banner? (8)

I believe the answer is:

streamer

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

'banner?' is the definition.
(both can mean a flag)

I don't understand the rest of the clue.

(Other definitions for streamer that I've seen before include "Long decorative strip of material" , "Long strip used at parties" , "Long, narrow flag" , "Long strip used for decoration or advertising" , "awful cold?" .)

I've seen this clue in The Guardian.

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