diff --git a/Pdf4QtLib/sources/pdf3d_u3d.cpp b/Pdf4QtLib/sources/pdf3d_u3d.cpp
index fbe814c..dca4428 100644
--- a/Pdf4QtLib/sources/pdf3d_u3d.cpp
+++ b/Pdf4QtLib/sources/pdf3d_u3d.cpp
@@ -434,6 +434,11 @@ const PDF3D_U3D_ContextManager::ContextData* PDF3D_U3D_ContextManager::getContex
     return nullptr;
 }
 
+PDF3D_U3D PDF3D_U3D::parse(QByteArray data)
+{
+    return PDF3D_U3D();
+}
+
 }   // namespace u3d
 
 }   // namespace pdf
diff --git a/Pdf4QtLib/sources/pdf3d_u3d.h b/Pdf4QtLib/sources/pdf3d_u3d.h
index 4ec9eed..8f66f32 100644
--- a/Pdf4QtLib/sources/pdf3d_u3d.h
+++ b/Pdf4QtLib/sources/pdf3d_u3d.h
@@ -31,6 +31,8 @@ namespace u3d
 class PDF3D_U3D
 {
 public:
+
+    static PDF3D_U3D parse(QByteArray data);
 };
 
 class PDF3D_U3D_ContextManager
diff --git a/Pdf4QtLib/sources/pdfannotation.cpp b/Pdf4QtLib/sources/pdfannotation.cpp
index b41f4cf..c7da6fc 100644
--- a/Pdf4QtLib/sources/pdfannotation.cpp
+++ b/Pdf4QtLib/sources/pdfannotation.cpp
@@ -1039,6 +1039,23 @@ bool PDFAnnotation::isTypeEditable(AnnotationType type)
     return false;
 }
 
+bool PDFAnnotation::isTypeMultimedia(AnnotationType type)
+{
+    switch (type)
+    {
+        case AnnotationType::Sound:
+        case AnnotationType::Movie:
+        case AnnotationType::_3D:
+        case AnnotationType::RichMedia:
+            return true;
+
+        default:
+            break;
+    }
+
+    return false;
+}
+
 QPen PDFAnnotation::getPen() const
 {
     QColor strokeColor = getStrokeColor();
@@ -1816,7 +1833,8 @@ void PDFWidgetAnnotationManager::mousePressEvent(QWidget* widget, QMouseEvent* e
 void PDFWidgetAnnotationManager::mouseDoubleClickEvent(QWidget* widget, QMouseEvent* event)
 {
     Q_UNUSED(widget);
-    Q_UNUSED(event);
+
+    updateFromMouseEvent(event);
 }
 
 void PDFWidgetAnnotationManager::mouseReleaseEvent(QWidget* widget, QMouseEvent* event)
@@ -1967,6 +1985,16 @@ void PDFWidgetAnnotationManager::updateFromMouseEvent(QMouseEvent* event)
                         Q_EMIT actionTriggered(linkAction);
                     }
                 }
+
+                // Execute multimedia annotation
+                if (event->type() == QEvent::MouseButtonDblClick && event->button() == Qt::LeftButton)
+                {
+                    const PDFAnnotation* annotation = pageAnnotation.annotation.get();
+                    if (PDFAnnotation::isTypeMultimedia(annotation->getType()))
+                    {
+                        emit multimediaTriggered(annotation);
+                    }
+                }
             }
             else
             {
diff --git a/Pdf4QtLib/sources/pdfannotation.h b/Pdf4QtLib/sources/pdfannotation.h
index cabc717..edddd6e 100644
--- a/Pdf4QtLib/sources/pdfannotation.h
+++ b/Pdf4QtLib/sources/pdfannotation.h
@@ -601,6 +601,10 @@ public:
     /// \param type Annotation type
     static bool isTypeEditable(AnnotationType type);
 
+    /// Returns true, if annotation is multimedia
+    /// \param type Annotation type
+    static bool isTypeMultimedia(AnnotationType type);
+
 protected:
     virtual QColor getStrokeColor() const;
     virtual QColor getFillColor() const;
@@ -1655,8 +1659,9 @@ public:
     virtual int getInputPriority() const override { return AnnotationPriority; }
 
 signals:
-    void actionTriggered(const PDFAction* action);
-    void documentModified(PDFModifiedDocument document);
+    void actionTriggered(const pdf::PDFAction* action);
+    void multimediaTriggered(const pdf::PDFAnnotation* annotation);
+    void documentModified(pdf::PDFModifiedDocument document);
 
 private:
     void updateFromMouseEvent(QMouseEvent* event);
diff --git a/Pdf4QtViewer/pdfmediaviewerdialog.cpp b/Pdf4QtViewer/pdfmediaviewerdialog.cpp
index b811da5..0385d38 100644
--- a/Pdf4QtViewer/pdfmediaviewerdialog.cpp
+++ b/Pdf4QtViewer/pdfmediaviewerdialog.cpp
@@ -18,6 +18,9 @@
 #include "pdfmediaviewerdialog.h"
 #include "ui_pdfmediaviewerdialog.h"
 #include "pdfwidgetutils.h"
+#include "pdfdocument.h"
+#include "pdfannotation.h"
+#include "pdf3d_u3d.h"
 #include "pdfdbgheap.h"
 
 #include <QColor>
@@ -161,4 +164,48 @@ void PDFMediaViewerDialog::initDemo()
     lightEntity->addComponent(lightTransform);
 }
 
+void PDFMediaViewerDialog::initFromAnnotation(const pdf::PDFDocument* document,
+                                              const pdf::PDFAnnotation* annotation)
+{
+    Q_ASSERT(document);
+    Q_ASSERT(annotation);
+
+    switch (annotation->getType())
+    {
+        case pdf::AnnotationType::_3D:
+        {
+            const pdf::PDF3DAnnotation* typedAnnotation = dynamic_cast<const pdf::PDF3DAnnotation*>(annotation);
+            initFrom3DAnnotation(document, typedAnnotation);
+            break;
+        }
+
+        default:
+            break;
+    }
+}
+
+void PDFMediaViewerDialog::initFrom3DAnnotation(const pdf::PDFDocument* document,
+                                                const pdf::PDF3DAnnotation* annotation)
+{
+    const pdf::PDF3DStream& stream = annotation->getStream();
+
+    pdf::PDFObject object = document->getObject(stream.getStream());
+    if (object.isStream())
+    {
+        QByteArray data = document->getDecodedStream(object.getStream());
+
+        switch (stream.getType())
+        {
+            case pdf::PDF3DStream::Type::U3D:
+                break;
+
+            case pdf::PDF3DStream::Type::PRC:
+                break;
+
+            default:
+                break;
+        }
+    }
+}
+
 }   // namespace pdfviewer
diff --git a/Pdf4QtViewer/pdfmediaviewerdialog.h b/Pdf4QtViewer/pdfmediaviewerdialog.h
index 7b3f412..0cb53b2 100644
--- a/Pdf4QtViewer/pdfmediaviewerdialog.h
+++ b/Pdf4QtViewer/pdfmediaviewerdialog.h
@@ -18,6 +18,8 @@
 #ifndef PDFMEDIAVIEWERDIALOG_H
 #define PDFMEDIAVIEWERDIALOG_H
 
+#include "pdfglobal.h"
+
 #include <QDialog>
 
 namespace Qt3DCore
@@ -35,6 +37,13 @@ namespace Ui
 class PDFMediaViewerDialog;
 }
 
+namespace pdf
+{
+class PDFDocument;
+class PDFAnnotation;
+class PDF3DAnnotation;
+}
+
 namespace pdfviewer
 {
 
@@ -47,8 +56,11 @@ public:
     virtual ~PDFMediaViewerDialog() override;
 
     void initDemo();
+    void initFromAnnotation(const pdf::PDFDocument* document, const pdf::PDFAnnotation* annotation);
 
 private:
+    void initFrom3DAnnotation(const pdf::PDFDocument* document, const pdf::PDF3DAnnotation* annotation);
+
     Ui::PDFMediaViewerDialog* ui;
     Qt3DExtras::Qt3DWindow* m_3dWindow = nullptr;
     Qt3DCore::QEntity* m_rootEntity = nullptr;
diff --git a/Pdf4QtViewer/pdfprogramcontroller.cpp b/Pdf4QtViewer/pdfprogramcontroller.cpp
index 1562448..c22065f 100644
--- a/Pdf4QtViewer/pdfprogramcontroller.cpp
+++ b/Pdf4QtViewer/pdfprogramcontroller.cpp
@@ -352,6 +352,7 @@ void PDFProgramController::initializeAnnotationManager()
 {
     m_annotationManager = new pdf::PDFWidgetAnnotationManager(m_pdfWidget->getDrawWidgetProxy(), this);
     connect(m_annotationManager, &pdf::PDFWidgetAnnotationManager::actionTriggered, this, &PDFProgramController::onActionTriggered);
+    connect(m_annotationManager, &pdf::PDFWidgetAnnotationManager::multimediaTriggered, this, &PDFProgramController::onMultimediaTriggered);
     connect(m_annotationManager, &pdf::PDFWidgetAnnotationManager::documentModified, this, &PDFProgramController::onDocumentModified);
     m_pdfWidget->setAnnotationManager(m_annotationManager);
 }
@@ -961,6 +962,13 @@ void PDFProgramController::onActionTriggered(const pdf::PDFAction* action)
     }
 }
 
+void PDFProgramController::onMultimediaTriggered(const pdf::PDFAnnotation* annotation)
+{
+    PDFMediaViewerDialog* dialog = new PDFMediaViewerDialog(getMainWindow());
+    dialog->initFromAnnotation(getDocument(), annotation);
+    dialog->open();
+}
+
 void PDFProgramController::initializeToolManager()
 {
     // Initialize tools
diff --git a/Pdf4QtViewer/pdfprogramcontroller.h b/Pdf4QtViewer/pdfprogramcontroller.h
index e9cd476..f089d09 100644
--- a/Pdf4QtViewer/pdfprogramcontroller.h
+++ b/Pdf4QtViewer/pdfprogramcontroller.h
@@ -43,6 +43,7 @@ class PDFWidget;
 class PDFCMSManager;
 class PDFToolManager;
 class PDFFormManager;
+class PDFAnnotation;
 class PDFWidgetAnnotationManager;
 }
 
@@ -289,6 +290,7 @@ public:
 
     void onActionTriggered(const pdf::PDFAction* action);
     void onDocumentModified(pdf::PDFModifiedDocument document);
+    void onMultimediaTriggered(const pdf::PDFAnnotation* annotation);
     void updateActionsAvailability();
 
     bool getIsBusy() const;