: For Facebook, the standard format is https://www.facebook.com/[PageID]/videos/[VideoID] . You can try entering these IDs into that structure to locate the source video.

: If the video is restricted or private, you may be required to log in or use a tool that supports private content downloads, though accessibility depends on the creator's privacy settings. How To Find a Facebook Ads Post ID In 90 Seconds

: Once you have the full URL, you can use built-in app features like "Save Video" on TikTok or third-party web downloaders for platforms that do not offer a native download button.