An idea pin is not a pin with extra pictures attached. It is a distinct content type closer to an Instagram story: a sequence of pages, each holding its own image or short video clip, plus any text or stickers the creator placed on top. Pinterest stores these as separate media files tied together by the pin, which is why the format behaves so differently from a normal image or video pin.
That structure is exactly what trips up most downloaders. A tool that assumes one pin equals one media file requests the pin, gets the cover, and returns it. To the user it looks like the download worked and the rest of the content vanished — and because the cover is usually the most polished page, the failure is easy to miss until you go looking for page four.
Text overlays are worth understanding before you download. Whatever the creator typed onto a page is rendered into that page's image or clip before Pinterest stores it. There is no separate text layer sitting on top at playback, so the words cannot be removed, repositioned or translated. If you are saving an idea pin for reference that is fine; if you wanted the clean background image underneath, it does not exist as a separate file.
One more practical note: pages within a single idea pin can mix formats freely. Page one might be a still, page two a six-second clip with audio, page three a still again. Each comes back in its own correct format here rather than being flattened, which matters if you are pulling the clips into an editor.