Update a post

Updates a post. Published posts are immutable and will return 400. The media field: Up to 20 public image or video URLs, each max 100MB. Files are downloaded server-side from the provided URLs. Pass an empty array to clear media. Stories support a single, non-GIF media item; submitting multiple media URLs or a GIF for a story returns 400. Set archived to true to archive a post or false to restore it; archiving removes any active schedule. Use videoThumbnail to set a custom video thumbnail (cover) from an image URL or from a video frame offset; the post must have a fully transcoded video (the first video is used for mixed media). Set notify to false to suppress notifications (email/in-app push, Zapier) for the edit activities created by this update; internal activity feed entries are always recorded. notify modifies nothing by itself, so it does not count towards the at-least-one-field requirement. It is not an approval request — use POST /posts/{id}/request-approval to notify approvers.