diff --git a/packages/core/src/notify_bridge_core/notifications/dispatcher.py b/packages/core/src/notify_bridge_core/notifications/dispatcher.py
index 7a50313..8b1ac71 100644
--- a/packages/core/src/notify_bridge_core/notifications/dispatcher.py
+++ b/packages/core/src/notify_bridge_core/notifications/dispatcher.py
@@ -150,20 +150,26 @@ class NotificationDispatcher:
             return {"success": False, "error": "No receivers configured"}
 
         # Prepare assets list once (shared across receivers)
-        provider_urls = []
-        if target.provider_internal_url:
-            provider_urls.append(target.provider_internal_url)
-        if target.provider_external_url:
-            provider_urls.append(target.provider_external_url)
+        # Prefer internal URL for fetching (LAN speed vs public internet)
+        internal_url = (target.provider_internal_url or "").rstrip("/")
+        external_url = (target.provider_external_url or "").rstrip("/")
+        provider_urls = [u for u in (internal_url, external_url) if u]
         assets = []
         for asset in event.added_assets[:max_media]:
             url = asset.full_url or asset.thumbnail_url
             if url:
+                # Rewrite external URL to internal for faster LAN fetching
+                if internal_url and external_url and url.startswith(external_url):
+                    url = internal_url + url[len(external_url):]
                 asset_type = "video" if asset.type.value == "video" else "photo"
                 asset_headers = {}
                 if target.provider_api_key and any(url.startswith(u) for u in provider_urls):
                     asset_headers["x-api-key"] = target.provider_api_key
-                assets.append({"url": url, "type": asset_type, "headers": asset_headers})
+                asset_entry: dict[str, Any] = {"url": url, "type": asset_type, "headers": asset_headers}
+                # Pass explicit cache_key if set by provider (e.g. Google Photos)
+                if asset.extra.get("cache_key"):
+                    asset_entry["cache_key"] = asset.extra["cache_key"]
+                assets.append(asset_entry)
 
         results: list[dict[str, Any]] = []
         async with aiohttp.ClientSession() as session: