Best Answer - Chosen by the Asker
요런 건 인증으로 여러분께 보내드립니다.
In my personal opinion, it's more of like "I'll take a photo of it and send/show it to you."
Since the fervent usage of smartphones, it's become a lot easier to take a photo of things whenever you want. So, there's this new word "인증샷" meaning "a photo to confirm something is true/real/happening." For example, you'll take a "인증샷" when you see a celebrity in a restaurant so you can show people you've actually seen them.
So, the speaker says "요런건 (A thing like this) 인증으로(as confirmation) 여러분께(to you) 보내드립니다(send)."
Hope this helps! :)
