diff --git a/.changeset/stack-narrow-video-cors.md b/.changeset/stack-narrow-video-cors.md
new file mode 100644
index 0000000..763d485
--- /dev/null
+++ b/.changeset/stack-narrow-video-cors.md
@@ -0,0 +1,5 @@
+---
+'@ioai/lerobot-studio': patch
+---
+
+Fix two embedding problems. Narrow containers (under 600px wide, measured on the viewer container rather than the window) now default to a single stacked column of panels that scrolls, and the chart panel toolbar wraps instead of clipping its line-chart and split-view controls; the desktop layout is unchanged. Every `<video>` (and the frame-extraction video and image decoder) now sets `crossOrigin="anonymous"`, so the media request and the later CORS `fetch()` of the same presigned URL share one CORS cache entry instead of the `fetch()` being blocked by a cached no-cors response; no credentials are sent.
diff --git a/src/core/utils/featureUtils.ts b/src/core/utils/featureUtils.ts
index fa02820..22d02e7 100644
--- a/src/core/utils/featureUtils.ts
+++ b/src/core/utils/featureUtils.ts
@@ -371,6 +371,17 @@ function getLegacyLayoutVisualRows(
 /** Narrow main panes cannot fit 4 Dockview tiles (100px min each) without clipping. */
 export const NARROW_VISUAL_ROW_WIDTH = 900;
 
+/** Container width (px) below which panels default to a single stacked column. */
+export const STACKED_PANELS_MAX_WIDTH = 600;
+
+export function isStackedPanelsWidth(containerWidth: number): boolean {
+  return (
+    Number.isFinite(containerWidth) &&
+    containerWidth > 0 &&
+    containerWidth < STACKED_PANELS_MAX_WIDTH
+  );
+}
+
 export function getVisualMaxPerRow(containerWidth: number): number {
   return containerWidth > 0 && containerWidth < NARROW_VISUAL_ROW_WIDTH ? 2 : 4;
 }
diff --git a/src/platform/services/mediaCopy.ts b/src/platform/services/mediaCopy.ts
index e24f5b9..437d163 100644
--- a/src/platform/services/mediaCopy.ts
+++ b/src/platform/services/mediaCopy.ts
@@ -122,6 +122,7 @@ export async function getVideoFramePngBlob(
   }
 
   const video = document.createElement('video');
+  video.crossOrigin = 'anonymous';
   video.muted = true;
   video.playsInline = true;
   video.preload = 'auto';
diff --git a/src/react/components/DockviewLayout.tsx b/src/react/components/DockviewLayout.tsx
index 2506d68..625ad58 100644
--- a/src/react/components/DockviewLayout.tsx
+++ b/src/react/components/DockviewLayout.tsx
@@ -8,7 +8,7 @@ import type { LeRobotFeature } from '@/core';
 import 'dockview-react/dist/styles/dockview.css';
 import { VideoPanel, ImagePanel, ChartPanel, RawPanel, PanelErrorBoundary } from './panels';
 import { PanelTitle } from './PanelTitle';
-import { getAutoLayoutVisualRows, getVisualMaxPerRow } from '@/core';
+import { getAutoLayoutVisualRows, getVisualMaxPerRow, isStackedPanelsWidth } from '@/core';
 import { safeAddPanel } from '../utils/dockviewPanelId';
 
 type DockviewSerializedGrid = {
@@ -21,6 +21,9 @@ type GridNode =
   | { type: 'leaf'; data: { id: string; activePanel: string; panels: string[] }; size: number }
   | { type: 'branch'; data: GridNode[]; size: number };
 
+/** Minimum height of each panel in the stacked (narrow) column; the column scrolls. */
+const STACKED_PANEL_MIN_HEIGHT_PX = 220;
+
 // Per-instance API context (multi-embed safe; no module singleton)
 const DockviewApiContext = createContext<DockviewApi | null>(null);
 
@@ -76,12 +79,16 @@ export const DockviewLayout: React.FC = () => {
   const { info } = useLeRobotData();
   const dockviewRef = useRef<HTMLDivElement>(null);
   const [maxPerRow, setMaxPerRow] = useState(4);
+  // Narrow containers (embedded viewers on phones) get a single stacked column.
+  const [stacked, setStacked] = useState(false);
+  const [panelCount, setPanelCount] = useState(0);
 
   useEffect(() => {
     const el = dockviewRef.current;
     if (!el) return;
     const update = (width: number) => {
       setMaxPerRow(getVisualMaxPerRow(width));
+      setStacked(isStackedPanelsWidth(width));
     };
     update(el.clientWidth);
     const observer = new ResizeObserver((entries) => {
@@ -279,6 +286,8 @@ export const DockviewLayout: React.FC = () => {
       .filter((v): v is NonNullable<typeof v> => Boolean(v));
     const visibleVisual = [...row1Visual, ...row2Visual];
 
+    setPanelCount(0);
+
     // 如果没有视觉源，降级为 chart + raw 横向均分（避免空白）
     if (visibleVisual.length === 0) {
       safeAddPanel(api, {
@@ -294,11 +303,35 @@ export const DockviewLayout: React.FC = () => {
         title: t('panels.raw.title'),
         params: {},
         tabComponent: 'default',
-        position: { referencePanel: 'chart-panel', direction: 'right' },
+        position: { referencePanel: 'chart-panel', direction: stacked ? 'below' : 'right' },
       });
       return;
     }
 
+    if (stacked) {
+      let previousId: string | null = null;
+      const stackedPanels = [
+        ...visibleVisual.map((v) => ({
+          id: v.id,
+          component: v.component,
+          title: v.title,
+          params: v.params as { featureKey?: string },
+        })),
+        { id: 'chart-panel', component: 'chart' as const, title: t('common.chart'), params: {} },
+        { id: 'raw-panel', component: 'raw' as const, title: t('panels.raw.title'), params: {} },
+      ];
+      for (const p of stackedPanels) {
+        safeAddPanel(api, {
+          ...p,
+          tabComponent: 'default',
+          ...(previousId ? { position: { referencePanel: previousId, direction: 'below' } } : {}),
+        });
+        previousId = p.id;
+      }
+      setPanelCount(stackedPanels.length);
+      return;
+    }
+
     const firstVisualId = row1Visual[0].id;
 
     // 先创建首个视觉面板
@@ -377,7 +410,7 @@ export const DockviewLayout: React.FC = () => {
       row1Visual.map((v) => v.id),
       row2Visual.map((v) => v.id),
     );
-  }, [info, t, maxPerRow]);
+  }, [info, t, maxPerRow, stacked]);
 
   const onReady = (event: DockviewReadyEvent) => {
     const { api } = event;
@@ -395,17 +428,31 @@ export const DockviewLayout: React.FC = () => {
 
   return (
     <DockviewApiContext.Provider value={dockviewApi}>
-      <div ref={dockviewRef} className="w-full h-full">
-        <DockviewReact
-          components={components}
-          tabComponents={tabComponents}
-          defaultTabComponent={PanelTitle}
-          singleTabMode="fullwidth"
-          /** 关闭标签栏溢出下拉（长标题时否则会遮挡 PanelTitle 右侧操作区） */
-          disableTabsOverflowList
-          onReady={onReady}
-          className={resolvedTheme === 'dark' ? 'dockview-theme-dark' : 'dockview-theme-light'}
-        />
+      <div
+        ref={dockviewRef}
+        className="w-full h-full"
+        data-layout={stacked ? 'stacked' : 'split'}
+        style={stacked ? { overflowY: 'auto', overflowX: 'hidden' } : undefined}
+      >
+        <div
+          className="w-full"
+          style={{
+            height: stacked
+              ? `max(100%, ${Math.max(panelCount, 1) * STACKED_PANEL_MIN_HEIGHT_PX}px)`
+              : '100%',
+          }}
+        >
+          <DockviewReact
+            components={components}
+            tabComponents={tabComponents}
+            defaultTabComponent={PanelTitle}
+            singleTabMode="fullwidth"
+            /** 关闭标签栏溢出下拉（长标题时否则会遮挡 PanelTitle 右侧操作区） */
+            disableTabsOverflowList
+            onReady={onReady}
+            className={resolvedTheme === 'dark' ? 'dockview-theme-dark' : 'dockview-theme-light'}
+          />
+        </div>
       </div>
     </DockviewApiContext.Provider>
   );
diff --git a/src/react/components/panels/ChartPanel/ChartPanel.tsx b/src/react/components/panels/ChartPanel/ChartPanel.tsx
index 13e91ed..14b2e3b 100644
--- a/src/react/components/panels/ChartPanel/ChartPanel.tsx
+++ b/src/react/components/panels/ChartPanel/ChartPanel.tsx
@@ -1292,7 +1292,7 @@ const ChartPanelContent: React.FC<ChartPanelProps> = ({ params }) => {
       className="w-full h-full flex flex-col bg-background text-foreground overflow-hidden"
     >
       <div className="flex flex-wrap items-center justify-between gap-y-1 px-3 py-1.5 border-b bg-muted/20">
-        <div className="flex items-center gap-2 overflow-hidden mr-2">
+        <div className="flex min-w-0 flex-wrap items-center gap-x-2 gap-y-1 mr-2">
           <ChartJointFilterDropdown {...jointFilterDropdownProps} />
           <Button
             type="button"
diff --git a/src/react/components/panels/ImagePanel/ImagePanel.tsx b/src/react/components/panels/ImagePanel/ImagePanel.tsx
index c8c1981..bdda056 100644
--- a/src/react/components/panels/ImagePanel/ImagePanel.tsx
+++ b/src/react/components/panels/ImagePanel/ImagePanel.tsx
@@ -173,6 +173,7 @@ export const ImagePanel: React.FC<ImagePanelProps> = ({ params }) => {
             if (isStillCurrent) {
               // 将 URL 转成 ImageBitmap 并绘制
               const img = new Image();
+              img.crossOrigin = 'anonymous';
               await new Promise<void>((resolve, reject) => {
                 img.onload = () => resolve();
                 img.onerror = () => reject(new Error('Image decode failed'));
diff --git a/src/react/components/panels/VideoPanel/VideoPanel.tsx b/src/react/components/panels/VideoPanel/VideoPanel.tsx
index 3891d5c..6e717eb 100644
--- a/src/react/components/panels/VideoPanel/VideoPanel.tsx
+++ b/src/react/components/panels/VideoPanel/VideoPanel.tsx
@@ -324,6 +324,7 @@ const VideoPanelContent: React.FC<VideoPanelProps> = ({ params }) => {
           transform: 'translateZ(0)',
           backfaceVisibility: 'hidden' as const,
         }}
+        crossOrigin="anonymous"
         muted
         playsInline
         preload="auto"
diff --git a/tests/browser/embed-layout.browser.spec.tsx b/tests/browser/embed-layout.browser.spec.tsx
index d9ce475..5c35fd8 100644
--- a/tests/browser/embed-layout.browser.spec.tsx
+++ b/tests/browser/embed-layout.browser.spec.tsx
@@ -155,6 +155,47 @@ describe('browser: embedded layout follows the host container', () => {
     expect(separator().getAttribute('aria-valuenow')).toBe('400');
   }, 60_000);
 
+  it('stacks dockview panels in one column at 390px and keeps the desktop grid at 1100px', async () => {
+    const layout = await mount(390);
+    await waitFor(() => layout.getAttribute('data-layout') === 'stacked');
+    const dock = () =>
+      host.querySelector<HTMLElement>(
+        '[data-testid="lerobot-viewer-layout"] [data-layout]:not([data-testid])',
+      );
+    await waitFor(() => (dock()?.querySelectorAll('.dv-groupview').length ?? 0) >= 3);
+    await waitFor(() => dock()?.getAttribute('data-layout') === 'stacked');
+    const groups = Array.from(dock()!.querySelectorAll<HTMLElement>('.dv-groupview'));
+    const boxes = groups.map((g) => g.getBoundingClientRect());
+    // One column: same left edge and width, each group strictly below the previous.
+    for (const box of boxes) {
+      expect(Math.round(box.left)).toBe(Math.round(boxes[0].left));
+      expect(Math.round(box.width)).toBe(Math.round(boxes[0].width));
+    }
+    for (let i = 1; i < boxes.length; i++) {
+      expect(boxes[i].top).toBeGreaterThanOrEqual(boxes[i - 1].bottom - 1);
+    }
+    expect(boxes[0].width).toBeGreaterThan(300);
+
+    host.style.width = '1100px';
+    await waitFor(() => dock()?.getAttribute('data-layout') === 'split');
+    await waitFor(() => {
+      const tops = Array.from(dock()!.querySelectorAll<HTMLElement>('.dv-groupview')).map((g) =>
+        Math.round(g.getBoundingClientRect().top),
+      );
+      return tops.length >= 3 && new Set(tops).size < tops.length;
+    });
+  }, 60_000);
+
+  it('loads every video element with crossOrigin="anonymous"', async () => {
+    await mount(1100);
+    await waitFor(() => host.querySelectorAll('video').length > 0);
+    const videos = Array.from(host.querySelectorAll('video'));
+    for (const video of videos) {
+      expect(video.getAttribute('crossorigin')).toBe('anonymous');
+      expect(video.crossOrigin).toBe('anonymous');
+    }
+  }, 60_000);
+
   it('resizes the stacked sidebar with the keyboard', async () => {
     const layout = await mount(500);
     await waitFor(() => layout.getAttribute('data-layout') === 'stacked');
diff --git a/tests/visual-layout-order.spec.ts b/tests/visual-layout-order.spec.ts
index 77b6763..f7b0598 100644
--- a/tests/visual-layout-order.spec.ts
+++ b/tests/visual-layout-order.spec.ts
@@ -1,5 +1,10 @@
 import { describe, expect, it } from 'vitest';
-import { classifyVisualFeatureKey, getAutoLayoutVisualRows, getVisualMaxPerRow } from '@/core';
+import {
+  classifyVisualFeatureKey,
+  getAutoLayoutVisualRows,
+  getVisualMaxPerRow,
+  isStackedPanelsWidth,
+} from '@/core';
 
 describe('visual auto layout', () => {
   it('with >=4 keys, groups by semantic bucket (head vs wrist) then packs rows', () => {
@@ -136,4 +141,12 @@ describe('visual auto layout', () => {
     expect(getVisualMaxPerRow(900)).toBe(4);
     expect(getVisualMaxPerRow(1280)).toBe(4);
   });
+
+  it('stacks panels into one column under 600px of container width', () => {
+    expect(isStackedPanelsWidth(390)).toBe(true);
+    expect(isStackedPanelsWidth(599)).toBe(true);
+    expect(isStackedPanelsWidth(600)).toBe(false);
+    expect(isStackedPanelsWidth(1280)).toBe(false);
+    expect(isStackedPanelsWidth(0)).toBe(false);
+  });
 });