diff --git a/apps/backend/src/routes/post.ts b/apps/backend/src/routes/post.ts
index d395c4d..d921751 100644
--- a/apps/backend/src/routes/post.ts
+++ b/apps/backend/src/routes/post.ts
@@ -577,7 +577,7 @@ export default new Elysia({ prefix: "/post" })
 
                             const { media: _media, ...tweetWithoutMedia } = tweetData.tweet;
                             const normalizedTags = normalizeTags(body.tag || ["미분류"]);
-                            const mediaType = (mediaItem.type === "video" || mediaItem.type === "gif") ? "video" : "image";
+                            const mediaType = (mediaItem.type === "video" || mediaItem.type === "gif" || (mediaItem.format && mediaItem.format.includes("video"))) ? "video" : "image";
                             
                             const result = await uploadAndCreateWithRetry({
                                 fileName,
diff --git a/apps/frontend/src/app/add/page.tsx b/apps/frontend/src/app/add/page.tsx
index 1ccc0dc..605c9a9 100644
--- a/apps/frontend/src/app/add/page.tsx
+++ b/apps/frontend/src/app/add/page.tsx
@@ -188,7 +188,7 @@ export default function AddPage() {
                 const items: PreviewItem[] = mediaItems
                     .map((m) => ({
                         url: (m as any).thumbnail_url || (m as any).url || "",
-                        type: (((m as any).type === "video" || (m as any).type === "gif") ? "video" : "image") as "image" | "video"
+                        type: (((m as any).type === "video" || (m as any).type === "gif" || ((m as any).format && (m as any).format.includes("video"))) ? "video" : "image") as "image" | "video"
                     }))
                     .filter((item) => item.url.length > 0);