diff --git a/src/settingsview/components/VideoSettings.qml b/src/settingsview/components/VideoSettings.qml
index a9c813af..064ed0a1 100644
--- a/src/settingsview/components/VideoSettings.qml
+++ b/src/settingsview/components/VideoSettings.qml
@@ -71,6 +71,13 @@ ColumnLayout {
 
         function onDefaultResChanged() {
             updatePreviewRatio()
+            if (previewWidget.visible)
+                startPreviewing(true)
+        }
+
+        function onDefaultFpsChanged() {
+            if (previewWidget.visible)
+                startPreviewing(true)
         }
 
         function onDeviceAvailable() {