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Regular Expression
`
<iframe\b[^>]*>(?:\s*</iframe>)
`
gm
Input 1
1
<iframe src="https://www.youtube-nocookie.com/embed/kTuLj0Nyhs4?controls=0&autoplay=0&rel=0" title="YouTube video player" allow="picture-in-picture" allowfullscreen> </iframe>a bc a <b> c<iframe src="https://www.youtube-nocookie.com/embed/kTuLj0Nyhs4?controls=0&autoplay=0&rel=0" title="YouTube video player" allow="picture-in-picture" allowfullscreen></iframe> a b c a b <c> <iframe src="https://www.youtube-nocookie.com/embed/kTuLj0Nyhs4?controls=0&autoplay=0&rel=0" title="YouTube video player" allow="picture-in-picture" allowfullscreen> </iframe> <a> b c
Substitution
<iframe src="https://www.youtube-nocookie.com/embed/kTuLj0Nyhs4?controls=0&autoplay=0&rel=0" title="YouTube video player" allow="picture-in-picture" allowfullscreen> </iframe>a bc a <b> c<iframe src="https://www.youtube-nocookie.com/embed/kTuLj0Nyhs4?controls=0&autoplay=0&rel=0" title="YouTube video player" allow="picture-in-picture" allowfullscreen></iframe> a b c a b <c> <iframe src="https://www.youtube-nocookie.com/embed/kTuLj0Nyhs4?controls=0&autoplay=0&rel=0" title="YouTube video player" allow="picture-in-picture" allowfullscreen> </iframe> <a> b c