Add review thumbnail URL to integration docs

covers the case where there is no active connection to the go2rtc stream and the camera takes a long time to start

docs/docs/integrations/home-assistant.md

@@ -245,6 +245,12 @@ To load a preview gif of a review item:
 https://HA_URL/api/frigate/notifications/<review-id>/review_preview.gif
 ```
 
+To load the thumbnail of a review item:
+
+```
+https://HA_URL/api/frigate/notifications/<review-id>/<camera>/review_thumbnail.webp
+```
+
 <a name="streams"></a>
 
 ## RTSP stream

web/src/components/player/MsePlayer.tsx

@@ -260,7 +260,7 @@ function MSEPlayer({
               // @ts-expect-error for typing
               value: codecs(MediaSource.isTypeSupported),
             },
-            3000,
+            (fallbackTimeout ?? 3) * 1000,
           ).catch(() => {
             if (wsRef.current) {
               onDisconnect();
@@ -290,7 +290,7 @@ function MSEPlayer({
               type: "mse",
               value: codecs(MediaSource.isTypeSupported),
             },
-            3000,
+            (fallbackTimeout ?? 3) * 1000,
           ).catch(() => {
             if (wsRef.current) {
               onDisconnect();