diff --git a/common/rfb/ServerCore.cxx b/common/rfb/ServerCore.cxx
index 750daae..19b8fee 100644
--- a/common/rfb/ServerCore.cxx
+++ b/common/rfb/ServerCore.cxx
@@ -92,3 +92,10 @@
 ("QueryConnect",
  "Prompt the local user to accept or reject incoming connections.",
  false);
+
+// TightVNC-specific parameters
+// FIXME: Disable special video handling when this parameter is 0.
+rfb::IntParameter rfb::Server::videoPriority
+("VideoPriority",
+ "Priority of sending updates for video area (0..8)",
+ 0, 0, 8);
diff --git a/common/rfb/ServerCore.h b/common/rfb/ServerCore.h
index 68d7b74..85d4e90 100644
--- a/common/rfb/ServerCore.h
+++ b/common/rfb/ServerCore.h
@@ -48,6 +48,9 @@
     static BoolParameter sendCutText;
     static BoolParameter queryConnect;
 
+    // TightVNC-specific parameters
+    static IntParameter videoPriority;
+
   };
 
 };
diff --git a/common/rfb/UpdateTracker.h b/common/rfb/UpdateTracker.h
index b6a7d74..9cd99ab 100644
--- a/common/rfb/UpdateTracker.h
+++ b/common/rfb/UpdateTracker.h
@@ -85,6 +85,11 @@
     // FIXME: Provide getUpdateInfo() with no clipping, for better efficiency.
     virtual void getUpdateInfo(UpdateInfo* info, const Region& cliprgn);
 
+    // Get coordinates of the video rectangle
+    virtual const Rect& getVideoArea() const {
+      return video_area;
+    }
+
     // Copy the contained updates to another tracker
     virtual void copyTo(UpdateTracker* to) const;
 
diff --git a/common/rfb/VNCSConnectionST.cxx b/common/rfb/VNCSConnectionST.cxx
index 95b99fd..a9c59f3 100644
--- a/common/rfb/VNCSConnectionST.cxx
+++ b/common/rfb/VNCSConnectionST.cxx
@@ -541,7 +541,13 @@
 
   updates.enable_copyrect(cp.useCopyRect);
 
-  server->checkUpdate();
+  static int counter = 1;
+  if (--counter > 0) {
+    server->checkVideoUpdate();
+  } else {
+    counter = rfb::Server::videoPriority;
+    server->checkUpdate();
+  }
 
   // Get the lists of updates. Prior to exporting the data to the `ui' object,
   // getUpdateInfo() will normalize the `updates' object such way that its
diff --git a/common/rfb/VNCServerST.cxx b/common/rfb/VNCServerST.cxx
index 93f947c..dc6c709 100644
--- a/common/rfb/VNCServerST.cxx
+++ b/common/rfb/VNCServerST.cxx
@@ -507,6 +507,22 @@
   comparer->clear();
 }
 
+void VNCServerST::checkVideoUpdate()
+{
+  const Rect &videoRect = comparer->getVideoArea();
+  Region videoRegion(videoRect);
+
+  if (!videoRegion.is_empty()) {
+    pb->grabRegion(videoRegion);
+
+    std::list<VNCSConnectionST*>::iterator ci, ci_next;
+    for (ci = clients.begin(); ci != clients.end(); ci = ci_next) {
+      ci_next = ci; ci_next++;
+      (*ci)->set_video_area(videoRect);
+    }
+  }
+}
+
 void VNCServerST::getConnInfo(ListConnInfo * listConn)
 {
   listConn->Clear();
diff --git a/common/rfb/VNCServerST.h b/common/rfb/VNCServerST.h
index 81ad4ec..213f6b1 100644
--- a/common/rfb/VNCServerST.h
+++ b/common/rfb/VNCServerST.h
@@ -238,6 +238,7 @@
 
     bool needRenderedCursor();
     void checkUpdate();
+    void checkVideoUpdate();
 
     SSecurityFactory* securityFactory;
     QueryConnectionHandler* queryConnectionHandler;