Include thumbnail when bridging reel share videos

mautrix_instagram/portal.py

@@ -864,20 +864,30 @@ class Portal(DBPortal, BasePortal):
     async def _reupload_instagram_xma(
         self, source: u.User, media: XMAMediaShareItem, intent: IntentAPI
     ) -> MediaMessageEventContent:
+        url = media.preview_url
+        info = ImageInfo(
+            mimetype=media.preview_url_mime_type,
+        )
+        reuploaded_image = await self._reupload_instagram_file(
+            source, url, MessageType.IMAGE, info, intent
+        )
         reel_clip_id = media.reel_share_clip_id
         if reel_clip_id:
             try:
                 fetched_clip = await source.client.fetch_clip(reel_clip_id)
-                return await self._reupload_instagram_media(source, fetched_clip.media, intent)
+                reuploaded_video = await self._reupload_instagram_media(
+                    source, fetched_clip.media, intent
+                )
             except Exception:
                 self.log.exception(f"Failed to fetch clip {reel_clip_id}, using fallback")
+            else:
+                reuploaded_video.info.thumbnail_file = reuploaded_image.file
+                reuploaded_video.info.thumbnail_url = reuploaded_image.url
+                reuploaded_video.info.thumbnail_info = reuploaded_image.info
+                return reuploaded_video
         elif "/reel/" in media.target_url:
             self.log.warning(f"No reel share clip ID found in {media.target_url}")
-        url = media.preview_url
-        info = ImageInfo(
-            mimetype=media.preview_url_mime_type,
-        )
-        return await self._reupload_instagram_file(source, url, MessageType.IMAGE, info, intent)
+        return reuploaded_image
 
     async def _reupload_instagram_voice(
         self, source: u.User, media: VoiceMediaItem, intent: IntentAPI