diff --git a/client/src/components/FloatingVideoWindow.vue b/client/src/components/FloatingVideoWindow.vue
index b2cd01d..303822e 100644
--- a/client/src/components/FloatingVideoWindow.vue
+++ b/client/src/components/FloatingVideoWindow.vue
@@ -39,6 +39,13 @@
         </button>
       </div>
     </footer>
+
+    <button
+      type="button"
+      class="floating-video-resize-handle"
+      title="Fenstergröße ändern"
+      @mousedown.stop.prevent="startResize"
+    ></button>
   </div>
 </template>
 
@@ -53,7 +60,8 @@ const selfVideoRef = ref(null);
 
 const windowStyle = computed(() => ({
   left: `${chatStore.floatingVideoPosition.x}px`,
-  top: `${chatStore.floatingVideoPosition.y}px`
+  top: `${chatStore.floatingVideoPosition.y}px`,
+  width: `${chatStore.floatingVideoSize.width}px`
 }));
 
 watch(
@@ -100,6 +108,29 @@ function startDrag(event) {
   window.addEventListener('mouseup', handleUp);
 }
 
+function startResize(event) {
+  const startX = event.clientX;
+  const startY = event.clientY;
+  const startWidth = chatStore.floatingVideoSize.width;
+  const measuredHeight = event.currentTarget?.closest('.floating-video-window')?.offsetHeight || 0;
+  const startHeight = chatStore.floatingVideoSize.height || measuredHeight;
+
+  const handleMove = (moveEvent) => {
+    chatStore.updateFloatingVideoSize({
+      width: startWidth + (moveEvent.clientX - startX),
+      height: startHeight + (moveEvent.clientY - startY)
+    });
+  };
+
+  const handleUp = () => {
+    window.removeEventListener('mousemove', handleMove);
+    window.removeEventListener('mouseup', handleUp);
+  };
+
+  window.addEventListener('mousemove', handleMove);
+  window.addEventListener('mouseup', handleUp);
+}
+
 onBeforeUnmount(() => {
   if (selfVideoRef.value) {
     selfVideoRef.value.srcObject = null;
@@ -111,7 +142,6 @@ onBeforeUnmount(() => {
 .floating-video-window {
   position: fixed;
   z-index: 1300;
-  width: min(46vw, 720px);
   min-width: 340px;
   border-radius: 16px;
   border: 1px solid #cad5ce;
@@ -224,9 +254,22 @@ onBeforeUnmount(() => {
   color: #ffffff;
 }
 
+.floating-video-resize-handle {
+  position: absolute;
+  right: 6px;
+  bottom: 6px;
+  width: 18px;
+  height: 18px;
+  border: 0;
+  padding: 0;
+  cursor: nwse-resize;
+  background:
+    linear-gradient(135deg, transparent 0 42%, rgba(29, 106, 66, 0.2) 42% 52%, transparent 52% 62%, rgba(29, 106, 66, 0.45) 62% 72%, transparent 72% 82%, rgba(29, 106, 66, 0.75) 82% 92%, transparent 92% 100%);
+}
+
 @media (max-width: 860px) {
   .floating-video-window {
-    width: calc(100vw - 24px);
+    width: calc(100vw - 24px) !important;
     min-width: 0;
     left: 12px !important;
     top: 12px !important;
diff --git a/client/src/components/VideoDock.vue b/client/src/components/VideoDock.vue
index 84d741e..6c3129e 100644
--- a/client/src/components/VideoDock.vue
+++ b/client/src/components/VideoDock.vue
@@ -19,7 +19,15 @@
       :key="session.callId"
       class="video-dock-card"
     >
-      <div class="video-card-frame">
+      <div
+        class="video-card-frame video-card-frame-clickable"
+        role="button"
+        tabindex="0"
+        :title="`${session.withUserName} in den Vordergrund holen`"
+        @click="chatStore.bringVideoSessionToFront(session.callId)"
+        @keyup.enter="chatStore.bringVideoSessionToFront(session.callId)"
+        @keyup.space.prevent="chatStore.bringVideoSessionToFront(session.callId)"
+      >
         <VideoSessionSurface :session="session" :muted="true" />
       </div>
       <div class="video-card-meta">
@@ -133,6 +141,10 @@ function statusLabel(status) {
   position: relative;
 }
 
+.video-card-frame-clickable {
+  cursor: pointer;
+}
+
 .video-card-frame video {
   width: 100%;
   height: 100%;
diff --git a/client/src/stores/chat.js b/client/src/stores/chat.js
index b1f2774..6ee6cf0 100644
--- a/client/src/stores/chat.js
+++ b/client/src/stores/chat.js
@@ -42,6 +42,10 @@ function createDefaultFloatingPosition() {
   return { x: 24, y: 24 };
 }
 
+function createDefaultFloatingSize() {
+  return { width: 720, height: 0 };
+}
+
 export const useChatStore = defineStore('chat', () => {
   const isLoggedIn = ref(false);
   const userName = ref('');
@@ -73,6 +77,7 @@ export const useChatStore = defineStore('chat', () => {
   const maxVideoConnectionsReached = ref(false);
   const foregroundVideoSessionId = ref(null);
   const floatingVideoPosition = ref(createDefaultFloatingPosition());
+  const floatingVideoSize = ref(createDefaultFloatingSize());
   const selfPreviewStream = shallowRef(null);
   const remoteStreams = ref({});
   const selfMuted = ref(false);
@@ -287,6 +292,7 @@ export const useChatStore = defineStore('chat', () => {
     selfMuted.value = false;
     selfCameraEnabled.value = true;
     floatingVideoPosition.value = createDefaultFloatingPosition();
+    floatingVideoSize.value = createDefaultFloatingSize();
   }
 
   async function ensureLocalPreviewStream() {
@@ -1030,6 +1036,12 @@ export const useChatStore = defineStore('chat', () => {
     };
   }
 
+  function updateFloatingVideoSize(size) {
+    const width = Math.max(340, Math.round(size.width || createDefaultFloatingSize().width));
+    const height = Math.max(0, Math.round(size.height || 0));
+    floatingVideoSize.value = { width, height };
+  }
+
   function toggleSelfMute() {
     selfMuted.value = !selfMuted.value;
     syncLocalTrackState();
@@ -1174,6 +1186,7 @@ export const useChatStore = defineStore('chat', () => {
     maxVideoConnectionsReached,
     foregroundVideoSessionId,
     floatingVideoPosition,
+    floatingVideoSize,
     selfPreviewStream,
     remoteStreams,
     selfMuted,
@@ -1207,6 +1220,7 @@ export const useChatStore = defineStore('chat', () => {
     bringVideoSessionToFront,
     minimizeForegroundVideo,
     updateFloatingVideoPosition,
+    updateFloatingVideoSize,
     toggleSelfMute,
     toggleSelfCamera
   };