diff --git a/src/types/post.ts b/src/types/post.ts
index 170d1d6..8ac3418 100644
--- a/src/types/post.ts
+++ b/src/types/post.ts
@@ -30,6 +30,7 @@ export type Attachment = {
   height?: number;
   durationSec?: number;
   posterUrl?: string;
+  thumbUrl?: string;
   thumbnailUrl?: string;
 };
 
diff --git a/src/utils/postResourceAdapter.ts b/src/utils/postResourceAdapter.ts
index 0a3086a..fec65b3 100644
--- a/src/utils/postResourceAdapter.ts
+++ b/src/utils/postResourceAdapter.ts
@@ -26,7 +26,7 @@ function coverFor(att: Attachment | undefined) {
   if (att.kind === "image" || att.mime.startsWith("image/")) {
     return att.thumbnailUrl || att.url;
   }
-  return att.posterUrl || att.thumbnailUrl || "";
+  return att.posterUrl || att.thumbUrl || att.thumbnailUrl || "";
 }
 
 export function postToResource(