diff --git a/lms-plugins/mediacms-moodle/filter/mediacms/launch.php b/lms-plugins/mediacms-moodle/filter/mediacms/launch.php
index 6cd8f533..c731c8fe 100644
--- a/lms-plugins/mediacms-moodle/filter/mediacms/launch.php
+++ b/lms-plugins/mediacms-moodle/filter/mediacms/launch.php
@@ -58,7 +58,7 @@ if ($courseid && $courseid != SITEID) {
     $course = $SITE;
 }
 
-// Get or create dummy activity for this course
+// Get or create the dummy activity (visible, non-stealth).
 try {
     $dummy_cmid = filter_mediacms_get_dummy_activity($courseid, $type->id);
 } catch (Exception $e) {
@@ -68,11 +68,9 @@ try {
     throw $e;
 }
 
-// Get the dummy activity instance from DB
-$cm = get_coursemodule_from_id('lti', $dummy_cmid, 0, false, MUST_EXIST);
+$cm       = get_coursemodule_from_id('lti', $dummy_cmid, 0, false, MUST_EXIST);
 $instance = $DB->get_record('lti', ['id' => $cm->instance], '*', MUST_EXIST);
 
-// Override with our media token for THIS launch only (doesn't save to DB)
 $custom_params = ["media_friendly_token=" . $mediatoken];
 
 // Add embed parameters if provided (check !== '' instead of !empty() because '0' is a valid value)
diff --git a/lms-plugins/mediacms-moodle/filter/mediacms/locallib.php b/lms-plugins/mediacms-moodle/filter/mediacms/locallib.php
index 443fd52e..c1f6c349 100644
--- a/lms-plugins/mediacms-moodle/filter/mediacms/locallib.php
+++ b/lms-plugins/mediacms-moodle/filter/mediacms/locallib.php
@@ -11,7 +11,7 @@ defined('MOODLE_INTERNAL') || die();
 
 /**
  * Find the first LTI activity for the MediaCMS tool in a course, or create a
- * hidden dummy one if none exists.
+ * visible dummy one if none exists. Repairs any existing stealth/hidden activity.
  *
  * @param int $courseid
  * @param int $typeid  LTI tool type ID
@@ -28,40 +28,41 @@ function filter_mediacms_get_dummy_activity($courseid, $typeid) {
                AND m.name = 'lti'
                AND lti.typeid = :typeid
                AND cm.deletioninprogress = 0
+          ORDER BY cm.visible DESC, cm.visibleoncoursepage DESC
              LIMIT 1";
 
     $existing = $DB->get_record_sql($sql, ['courseid' => $courseid, 'typeid' => $typeid]);
     if ($existing) {
         $cm = get_coursemodule_from_id('lti', $existing->id, 0, false, IGNORE_MISSING);
-        if ($cm && !$cm->visible) {
+        if ($cm && (!$cm->visible || !$cm->visibleoncoursepage)) {
+            // Repair hidden or stealth activity so students can access it via LTI flow.
             set_coursemodule_visible($existing->id, 1);
         }
         return $existing->id;
     }
 
-    // Create a stealth dummy activity (accessible but hidden from the course page).
+    // Create a fully visible dummy activity.
     $moduleinfo = new stdClass();
-    $moduleinfo->course             = $courseid;
-    $moduleinfo->module             = $DB->get_field('modules', 'id', ['name' => 'lti']);
-    $moduleinfo->modulename         = 'lti';
-    $moduleinfo->section            = 0;
-    $moduleinfo->visible            = 1;
-    $moduleinfo->visibleoncoursepage = 0;
-    $moduleinfo->availability       = null;
-    $moduleinfo->showdescription    = 0;
-    $moduleinfo->name               = 'MediaCMS Filter Launcher';
-    $moduleinfo->intro              = '';
-    $moduleinfo->introformat        = FORMAT_HTML;
-    $moduleinfo->typeid             = $typeid;
+    $moduleinfo->course              = $courseid;
+    $moduleinfo->module              = $DB->get_field('modules', 'id', ['name' => 'lti']);
+    $moduleinfo->modulename          = 'lti';
+    $moduleinfo->section             = 0;
+    $moduleinfo->visible             = 1;
+    $moduleinfo->visibleoncoursepage = 1;
+    $moduleinfo->availability        = null;
+    $moduleinfo->showdescription     = 0;
+    $moduleinfo->name                = 'MediaCMS Filter Launcher';
+    $moduleinfo->intro               = '';
+    $moduleinfo->introformat         = FORMAT_HTML;
+    $moduleinfo->typeid              = $typeid;
     $moduleinfo->instructorchoiceacceptgrades  = 0;
-    $moduleinfo->grade              = 0;
+    $moduleinfo->grade               = 0;
     $moduleinfo->instructorchoicesendname      = 1;
     $moduleinfo->instructorchoicesendemailaddr = 1;
-    $moduleinfo->launchcontainer    = LTI_LAUNCH_CONTAINER_EMBED_NO_BLOCKS;
+    $moduleinfo->launchcontainer     = LTI_LAUNCH_CONTAINER_EMBED_NO_BLOCKS;
     $moduleinfo->instructorcustomparameters    = '';
 
     $result = add_moduleinfo($moduleinfo, get_course($courseid));
-    set_coursemodule_visible($result->coursemodule, 1, 0);
 
     return $result->coursemodule;
 }
diff --git a/lms-plugins/mediacms-moodle/filter/mediacms/lti_launch.php b/lms-plugins/mediacms-moodle/filter/mediacms/lti_launch.php
index 3d15d014..9951ed8a 100644
--- a/lms-plugins/mediacms-moodle/filter/mediacms/lti_launch.php
+++ b/lms-plugins/mediacms-moodle/filter/mediacms/lti_launch.php
@@ -60,8 +60,21 @@ foreach ($enrolled_courses as $enrolled_course) {
 
 $publishdata_b64 = base64_encode(json_encode($publish_data));
 
+// Use a course the user is actually enrolled in so they have mod/lti:view during
+// the OIDC flow. Fall back to SITEID only for admins with no course enrolments.
+$launch_courseid = SITEID;
+$launch_course   = $SITE;
+foreach ($enrolled_courses as $ec) {
+    if ((int)$ec->id !== SITEID) {
+        $launch_courseid = (int)$ec->id;
+        $launch_course   = get_course($launch_courseid);
+        break;
+    }
+}
+
+// Get or create the dummy activity (visible, non-stealth).
 try {
-    $dummy_cmid = filter_mediacms_get_dummy_activity(SITEID, $type->id);
+    $dummy_cmid = filter_mediacms_get_dummy_activity($launch_courseid, $type->id);
 } catch (Exception $e) {
     throw new moodle_exception('cannotcreatedummyactivity', 'filter_mediacms');
 }
@@ -73,6 +86,6 @@ $instance->instructorcustomparameters = 'publishdata=' . $publishdata_b64;
 $instance->name = 'MediaCMS My Media';
 
 $typeconfig = lti_get_type_type_config($type->id);
-$content    = lti_initiate_login($SITE->id, $dummy_cmid, $instance, $typeconfig, null, $instance->name);
+$content    = lti_initiate_login($launch_course->id, $dummy_cmid, $instance, $typeconfig, null, $instance->name);
 
 echo $content;
diff --git a/lms-plugins/mediacms-moodle/filter/mediacms/my_media.php b/lms-plugins/mediacms-moodle/filter/mediacms/my_media.php
index 6eaa8777..4638f74b 100644
--- a/lms-plugins/mediacms-moodle/filter/mediacms/my_media.php
+++ b/lms-plugins/mediacms-moodle/filter/mediacms/my_media.php
@@ -27,11 +27,9 @@ echo $OUTPUT->header();
 $attr = [
     'id'              => 'contentframe',
     'src'             => (new moodle_url('/filter/mediacms/lti_launch.php'))->out(false),
-    'width'           => '100%',
-    'height'          => '600px',
     'allowfullscreen' => 'true',
     'allow'           => 'autoplay *; fullscreen *; encrypted-media *; camera *; microphone *;',
-    'style'           => 'border:none;display:block;',
+    'style'           => 'border:none;display:block;width:100%;height:calc(100vh - 120px);',
 ];
 echo html_writer::tag('iframe', '', $attr);