diff --git a/src/main/java/eu/crushedpixel/replaymod/gui/GuiVideoRenderer.java b/src/main/java/eu/crushedpixel/replaymod/gui/GuiVideoRenderer.java
index e1140f31..b8ba6ba3 100644
--- a/src/main/java/eu/crushedpixel/replaymod/gui/GuiVideoRenderer.java
+++ b/src/main/java/eu/crushedpixel/replaymod/gui/GuiVideoRenderer.java
@@ -43,6 +43,8 @@ public class GuiVideoRenderer extends GuiScreen {
     private DynamicTexture previewTexture;
     private boolean previewTextureDirty;
 
+    private boolean initialized = false;
+
     public GuiVideoRenderer(VideoRenderer renderer) {
         this.renderer = renderer;
     }
@@ -50,19 +52,40 @@ public class GuiVideoRenderer extends GuiScreen {
     @Override
     @SuppressWarnings("unchecked") // I blame forge for not re-adding generics to that list
     public void initGui() {
-        String text = PAUSE_RENDERING;
-        buttonList.add(pauseButton = new GuiButton(1, width / 2 - 152, height - 10 - 20, text));
+        if(!initialized) {
+            String text = PAUSE_RENDERING;
+            pauseButton = new GuiButton(1, width / 2 - 152, height - 10 - 20, text);
 
-        text = CANCEL;
-        buttonList.add(cancelButton = new GuiButton(1, width / 2 + 2, height - 10 - 20, text));
+            text = CANCEL;
+            cancelButton = new GuiButton(1, width / 2 + 2, height - 10 - 20, text);
 
-        pauseButton.width = cancelButton.width = 150;
+            pauseButton.width = cancelButton.width = 150;
 
-        progressBar = new GuiProgressBar(10, height - 10 - 20 - 10 - 20, width-20, 20);
+            progressBar = new GuiProgressBar(10, height - 10 - 20 - 10 - 20, width-20, 20);
 
-        text = PREVIEW;
-        buttonList.add(previewCheckBox = new GuiCheckBox(0, (width - fontRendererObj.getStringWidth(text)) / 2 - 8,
-                pauseButton.yPosition - 10 - 20 - 10 - 20 - 5 , text, false));
+            text = PREVIEW;
+            previewCheckBox = new GuiCheckBox(0, (width - fontRendererObj.getStringWidth(text)) / 2 - 8,
+                    pauseButton.yPosition - 10 - 20 - 10 - 20 - 5 , text, false);
+        } else {
+            pauseButton.xPosition = width / 2 - 152;
+            pauseButton.yPosition = height - 10 - 20;
+
+            cancelButton.xPosition = width / 2 + 2;
+            cancelButton.yPosition = height - 10 - 20;
+
+            progressBar.setBounds(10, height - 10 - 20 - 10 - 20, width - 20, 20);
+
+            previewCheckBox.xPosition = (width - fontRendererObj.getStringWidth(PREVIEW)) / 2 - 8;
+            previewCheckBox.yPosition = pauseButton.yPosition - 10 - 20 - 10 - 20 - 5;
+        }
+
+        buttonList.add(pauseButton);
+        buttonList.add(cancelButton);
+        buttonList.add(previewCheckBox);
+
+        initialized = true;
+
+        super.initGui();
     }
 
     @Override
diff --git a/src/main/java/eu/crushedpixel/replaymod/video/VideoRenderer.java b/src/main/java/eu/crushedpixel/replaymod/video/VideoRenderer.java
index 4cae86fa..80caf682 100644
--- a/src/main/java/eu/crushedpixel/replaymod/video/VideoRenderer.java
+++ b/src/main/java/eu/crushedpixel/replaymod/video/VideoRenderer.java
@@ -365,6 +365,12 @@ public class VideoRenderer implements RenderInfo {
                 throw new RuntimeException(e);
             }
 
+            //if not in high performance mode, update the gui size if screen size changed
+            //this takes virtually no time
+            if(!options.isHighPerformance()) {
+                mc.updateDisplay();
+            }
+
             ScaledResolution scaled = new ScaledResolution(mc, mc.displayWidth, mc.displayHeight);
             int mouseX = Mouse.getX() * scaled.getScaledWidth() / mc.displayWidth;
             int mouseY = scaled.getScaledHeight() - Mouse.getY() * scaled.getScaledHeight() / mc.displayHeight - 1;