Tidy up connection logic (#90)

* Add code:

* code

* code

---------

Co-authored-by: Freddy Boulton <freddyboulton@hf-freddy.local>

frontend/shared/StaticVideo.svelte

@@ -47,6 +47,11 @@
 				case "disconnected":
 					stop(pc);
 					break;
+				case "failed":
+					stream_state = "closed";
+					dispatch("error", "Connection failed!");
+					stop(pc);
+					break;
 				default:
 					break;
 			}