updated comment

Emby.Server.Implementations/ApplicationHost.cs

@@ -1203,7 +1203,8 @@ namespace Emby.Server.Implementations
         /// <inheritdoc/>
         public string GetLoopbackHttpApiUrl()
         {
-            // Passing an external address cause GetBindInterface to return an externally accessible interface (if possible).
+            // Passing an external address cause GetBindInterface to return the externally facing interface on a multi-adapter system.
+            // LocalNetworkSubnets and LocalNetworkAddresses are used in conjunction with the ip address to help select the best interface.
             return GetLocalApiUrl(NetManager.GetBindInterface("8.8.8.8", out var _), Uri.UriSchemeHttp, HttpPort);
         }