Added LiveStreamOffline exception

src/main/java/com/github/felipeucelli/javatube/Youtube.java

@@ -263,6 +263,9 @@ void checkAvailability() throws Exception {
                     throw new VideoPrivateError(videoId());
                 }
             }
+
+            case "LIVE_STREAM_OFFLINE" -> throw new LiveStreamOffline(videoId(), reason);
+
             case "ERROR" -> {
                 if (reason.equals("Video unavailable")) {
                     throw new VideoUnavailableError(videoId());

src/main/java/com/github/felipeucelli/javatube/exceptions/LiveStreamOffline.java

@@ -0,0 +1,7 @@
+package com.github.felipeucelli.javatube.exceptions;
+
+public class LiveStreamOffline extends Exception{
+    public LiveStreamOffline(String videoId, String reason){
+        super(videoId + " " + reason);
+    }
+}