diff --git a/src/octoprint/plugins/corewizard/templates/corewizard_webcam_wizard.jinja2 b/src/octoprint/plugins/corewizard/templates/corewizard_webcam_wizard.jinja2
index 052961df..006d0938 100644
--- a/src/octoprint/plugins/corewizard/templates/corewizard_webcam_wizard.jinja2
+++ b/src/octoprint/plugins/corewizard/templates/corewizard_webcam_wizard.jinja2
@@ -22,7 +22,7 @@
 </p><p>
     The <strong>Snapshot URL</strong> is the URL OctoPrint uses to fetch single
     images from the webcam for creating timelapse recordings. This needs to be
-    reachable <strong>from the OctoPrint server</strong>.
+    a fully qualified URL reachable <strong>from the OctoPrint server</strong>.
 </p>{% endtrans %}
 
 <form class="form-horizontal" data-bind="with: settingsViewModel">
diff --git a/src/octoprint/plugins/cura/templates/snippets/cura_engine.jinja2 b/src/octoprint/plugins/cura/templates/snippets/cura_engine.jinja2
index b05802a1..0c668b92 100644
--- a/src/octoprint/plugins/cura/templates/snippets/cura_engine.jinja2
+++ b/src/octoprint/plugins/cura/templates/snippets/cura_engine.jinja2
@@ -3,8 +3,8 @@
         <label class="control-label" for="settings-cura-path">{{ _('Path to CuraEngine') }}</label>
         <div class="controls">
             <div class="input-append">
-                <input type="text" class="input-block-level" data-bind="value: settings.plugins.cura.cura_engine">
-                <button class="btn" type="button" data-bind="click: testEnginePath">{{ _('Test') }}</button>
+                <input type="text" class="input-block-level" data-bind="value: settings.plugins.cura.cura_engine, valueUpdate: 'afterkeydown'">
+                <button class="btn" type="button" data-bind="click: testEnginePath, enable: testEnginePath(), css: {disabled: !testEnginePath()}">{{ _('Test') }}</button>
             </div>
             <span class="help-block" data-bind="visible: pathBroken() || pathOk, text: pathText"></span>
         </div>
diff --git a/src/octoprint/static/js/app/helpers.js b/src/octoprint/static/js/app/helpers.js
index 5759670f..2652d601 100644
--- a/src/octoprint/static/js/app/helpers.js
+++ b/src/octoprint/static/js/app/helpers.js
@@ -446,6 +446,8 @@ function showMessageDialog(msg, options) {
     var message = options.message || "";
     var close = options.close || gettext("Close");
     var onclose = options.onclose || undefined;
+    var onshow = options.onshow || undefined;
+    var onshown = options.onshown || undefined;
 
     if (_.isString(message)) {
         message = $("<p>" + message + "</p>");
@@ -467,6 +469,14 @@ function showMessageDialog(msg, options) {
         }
     });
 
+    if (onshow) {
+        modal.on("show", onshow);
+    }
+
+    if (onshown) {
+        modal.on("shown", onshown);
+    }
+
     modal.modal("show");
     return modal;
 }
diff --git a/src/octoprint/static/js/app/viewmodels/settings.js b/src/octoprint/static/js/app/viewmodels/settings.js
index 25be4dc1..1900e1b1 100644
--- a/src/octoprint/static/js/app/viewmodels/settings.js
+++ b/src/octoprint/static/js/app/viewmodels/settings.js
@@ -170,6 +170,11 @@ $(function() {
         self.webcam_ffmpegPathText = ko.observable();
         self.webcam_ffmpegPathOk = ko.observable(false);
         self.webcam_ffmpegPathBroken = ko.observable(false);
+        self.webcam_ffmpegPathReset = function() {
+            self.webcam_ffmpegPathText("");
+            self.webcam_ffmpegPathOk(false);
+            self.webcam_ffmpegPathBroken(false);
+        };
 
         self.addTemperatureProfile = function() {
             self.temperature_profiles.push({name: "New", extruder:0, bed:0});
@@ -193,9 +198,13 @@ $(function() {
             }
 
             var text = gettext("If you see your webcam stream below, the entered stream URL is ok.");
+            var image = $('<img src="' + self.webcam_streamUrl() + '">');
+            var message = $("<p></p>")
+                .append(text)
+                .append(image);
             showMessageDialog({
                 title: gettext("Stream test"),
-                message: '<p>' + text + '</p><p><img src="' + self.webcam_streamUrl() + '" /></p>'
+                message: message
             });
         };
 
@@ -296,6 +305,10 @@ $(function() {
             self.requestData();
         };
 
+        self.onSettingsHidden = function() {
+            self.webcam_ffmpegPathReset();
+        };
+
         self.isDialogActive = function() {
             return self.settingsDialog.is(":visible");
         };
diff --git a/src/octoprint/templates/dialogs/_snippets/configureffmpeg.jinja2 b/src/octoprint/templates/dialogs/_snippets/configureffmpeg.jinja2
index b2eb4136..14375942 100644
--- a/src/octoprint/templates/dialogs/_snippets/configureffmpeg.jinja2
+++ b/src/octoprint/templates/dialogs/_snippets/configureffmpeg.jinja2
@@ -1,10 +1,10 @@
-<div class="control-group" title="{{ _('Full path to the FFMPEG binary') }}">
+<div class="control-group" title="{{ _('Full path to the FFMPEG binary') }}" data-bind="css: {error: webcam_ffmpegPathBroken, success: webcam_ffmpegPathOk}">
     <label class="control-label" for="settings-webcamFfmpegPath">{{ _('Path to FFMPEG') }}</label>
     <div class="controls">
         <div class="input-append">
-            <input type="text" class="input-block-level" data-bind="value: webcam_ffmpegPath" id="settings-webcamFfmpegPath">
+            <input type="text" class="input-block-level" data-bind="value: webcam_ffmpegPath, valueUpdate: 'afterkeydown'" id="settings-webcamFfmpegPath">
             <button class="btn" type="button" data-bind="click: testWebcamFfmpegPath, enable: webcam_ffmpegPath(), css: {disabled: !webcam_ffmpegPath()}">{{ _('Test') }}</button>
         </div>
-        <span class="help-block" data-bind="visible: webcam_ffmpegPathBroken() || webcam_ffmpegPathOk, text: webcam_ffmpegPathText"></span>
+        <span class="help-block" data-bind="visible: webcam_ffmpegPathBroken() || webcam_ffmpegPathOk(), text: webcam_ffmpegPathText"></span>
     </div>
 </div>
diff --git a/src/octoprint/templates/dialogs/_snippets/configurewebcamurls.jinja2 b/src/octoprint/templates/dialogs/_snippets/configurewebcamurls.jinja2
index ab963a11..c2ca6c01 100644
--- a/src/octoprint/templates/dialogs/_snippets/configurewebcamurls.jinja2
+++ b/src/octoprint/templates/dialogs/_snippets/configurewebcamurls.jinja2
@@ -2,7 +2,7 @@
     <label class="control-label" for="settings-webcamStreamUrl">{{ _('Stream URL') }}</label>
     <div class="controls">
         <div class="input-append">
-            <input type="text" class="input-block-level" data-bind="value: webcam_streamUrl" id="settings-webcamStreamUrl">
+            <input type="text" class="input-block-level" data-bind="value: webcam_streamUrl, valueUpdate: 'afterkeydown'" id="settings-webcamStreamUrl">
             <button class="btn" type="button" data-bind="click: testWebcamStreamUrl, enable: webcam_streamUrl(), css: {disabled: !webcam_streamUrl()}">{{ _('Test') }}</button>
         </div>
     </div>
@@ -11,7 +11,7 @@
     <label class="control-label" for="settings-webcamSnapshotUrl">{{ _('Snapshot URL') }}</label>
     <div class="controls">
         <div class="input-append">
-            <input type="text" class="input-block-level" data-bind="value: webcam_snapshotUrl" id="settings-webcamSnapshotUrl">
+            <input type="text" class="input-block-level" data-bind="value: webcam_snapshotUrl, valueUpdate: 'afterkeydown'" id="settings-webcamSnapshotUrl">
             <button class="btn" type="button" data-bind="click: testWebcamSnapshotUrl, enable: webcam_snapshotUrl(), css: {disabled: !webcam_snapshotUrl()}">{{ _('Test') }}</button>
         </div>
     </div>