diff --git a/main.cpp b/main.cpp
index 7fee7fd..b82ec3e 100644
--- a/main.cpp
+++ b/main.cpp
@@ -48,7 +48,8 @@ unsigned short THREADS_NUMBER = 1;
 string CHANNELS_DIRECTORY = "channels/",
        CHANNELS_FILE_PATH = "channels.txt",
        KEYS_FILE_PATH = "keys.txt",
-       apiKey = ""; // Will firstly be filled with `KEYS_FILE_PATH` first line.
+       apiKey = "", // Will firstly be filled with `KEYS_FILE_PATH` first line.
+       YOUTUBE_OPERATIONAL_API_INSTANCE_URL = "http://localhost/YouTube-operational-API"; // Can be "https://yt.lemnoslife.com" for instance.
 bool USE_YT_LEMNOSLIFE_COM_NO_KEY_SERVICE = false;
 
 int main(int argc, char *argv[])
@@ -66,13 +67,26 @@ int main(int argc, char *argv[])
         }
         else if(argvStr == "-h" || argvStr == "--help")
         {
-            MAIN_PRINT("Usage: " << argv[0] << " [--help/-h] [--no-keys] [--threads=N]")
-            exit(0);
+            MAIN_PRINT("Usage: " << argv[0] << " [--help/-h] [--no-keys] [--threads=N] [--youtube-operational-api-instance-url URL]")
+            exit(EXIT_SUCCESS);
+        }
+        else if(argvStr == "--youtube-operational-api-instance-url")
+        {
+            if(argvIndex < argc - 1)
+            {
+                YOUTUBE_OPERATIONAL_API_INSTANCE_URL = string(argv[argvIndex + 1]);
+                argvIndex++;
+            }
+            else
+            {
+                MAIN_PRINT("YouTube operational API instance URL missing!")
+                exit(EXIT_FAILURE);
+            }
         }
         else
         {
             MAIN_PRINT("Unrecognized parameter " << argvStr)
-            exit(1);
+            exit(EXIT_FAILURE);
         }
     }
 
@@ -253,7 +267,7 @@ void treatChannelOrVideo(unsigned short threadId, bool isChannel, string id, str
                     if(data.contains("error"))
                     {
                         PRINT(threadId, "Not listing comments on videos, as `playlistItems` hasn't found the `uploads` playlist!")
-                        exit(1);
+                        exit(EXIT_FAILURE);
                     }
                     json items = data["items"];
                     for(const auto& item : items)
@@ -282,7 +296,7 @@ void treatChannelOrVideo(unsigned short threadId, bool isChannel, string id, str
             else //if(videoCount >= 20000)
             {
                 PRINT(threadId, "The videos count of the channel exceeds the supported 20,000 limit!")
-                exit(1);
+                exit(EXIT_FAILURE);
             }
         }
     }
@@ -404,7 +418,7 @@ json getJson(unsigned short threadId, string url, string directoryPath, getJsonB
     catch (json::parse_error& ex)
     {
         PRINT(threadId, "Parse error for " << finalUrl << ", as got: " << content << " !")
-        exit(1);
+        exit(EXIT_FAILURE);
     }
 
     if(data.contains("error"))