으면 알리다

let me know if there's any

Nearly every line here is 있으면 알려주세요 — "if there is one, let me know" — a creator asking their audience to send something in: 다른 의견 있으면 알려주세요 여러분, 어디 뭐 좋은 천문대 있으면 알려주시기 바랍니다, 그런 게 있으면 알려주시고. 알리다 almost never appears bare; it comes as 알려주다 or the humbler 알려드리다, where the attached -주다 marks it as doing someone a favour. The register throughout is polite and addressed outward to viewers.

Register: polite request to an audience