diff --git a/static/js/components/shared/ModelVersionsTab.js b/static/js/components/shared/ModelVersionsTab.js
index 6b1e5364..b8061270 100644
--- a/static/js/components/shared/ModelVersionsTab.js
+++ b/static/js/components/shared/ModelVersionsTab.js
@@ -19,19 +19,77 @@ function escapeHtml(value) {
         .replace(/'/g, ''');
 }
 
+function extractExtension(value) {
+    if (value == null) {
+        return '';
+    }
+    const targets = [];
+    const stringValue = String(value);
+    if (stringValue) {
+        targets.push(stringValue);
+        stringValue.split(/[?&=]/).forEach(fragment => {
+            if (fragment) {
+                targets.push(fragment);
+            }
+        });
+    }
+
+    for (const target of targets) {
+        let candidate = target;
+        try {
+            candidate = decodeURIComponent(candidate);
+        } catch (error) {
+            // ignoring malformed sequences, fallback to raw value
+        }
+        const lastDot = candidate.lastIndexOf('.');
+        if (lastDot === -1) {
+            continue;
+        }
+        const extension = candidate.slice(lastDot).toLowerCase();
+        if (extension.includes('/') || extension.includes('\\')) {
+            continue;
+        }
+        return extension;
+    }
+
+    return '';
+}
+
 function isVideoUrl(url) {
     if (!url || typeof url !== 'string') {
         return false;
     }
+
+    const candidates = new Set();
+    const addCandidate = value => {
+        if (value == null) {
+            return;
+        }
+        const stringValue = String(value);
+        if (!stringValue) {
+            return;
+        }
+        candidates.add(stringValue);
+    };
+
+    addCandidate(url);
+
     try {
         const parsed = new URL(url, window.location.origin);
-        const pathname = parsed.pathname || '';
-        const extension = pathname.slice(pathname.lastIndexOf('.')).toLowerCase();
-        return VIDEO_EXTENSIONS.includes(extension);
+        addCandidate(parsed.pathname);
+        parsed.searchParams.forEach(value => addCandidate(value));
     } catch (error) {
-        const normalized = url.split('?')[0].toLowerCase();
-        return VIDEO_EXTENSIONS.some(ext => normalized.endsWith(ext));
+        // ignore parse errors and rely on fallbacks below
     }
+
+    for (const candidate of candidates) {
+        const extension = extractExtension(candidate);
+        if (extension && VIDEO_EXTENSIONS.includes(extension)) {
+            return true;
+        }
+    }
+
+    return false;
 }
 
 function formatDateLabel(value) {
diff --git a/tests/frontend/components/modelVersionsTab.media.test.js b/tests/frontend/components/modelVersionsTab.media.test.js
new file mode 100644
index 00000000..b8b3a287
--- /dev/null
+++ b/tests/frontend/components/modelVersionsTab.media.test.js
@@ -0,0 +1,149 @@
+import { describe, it, beforeEach, afterEach, expect, vi } from 'vitest';
+
+const {
+  MODEL_VERSIONS_MODULE,
+  API_FACTORY_MODULE,
+  DOWNLOAD_MANAGER_MODULE,
+  UI_HELPERS_MODULE,
+  STATE_MODULE,
+  I18N_HELPERS_MODULE,
+  UTILS_MODULE,
+} = vi.hoisted(() => ({
+  MODEL_VERSIONS_MODULE: new URL('../../../static/js/components/shared/ModelVersionsTab.js', import.meta.url).pathname,
+  API_FACTORY_MODULE: new URL('../../../static/js/api/modelApiFactory.js', import.meta.url).pathname,
+  DOWNLOAD_MANAGER_MODULE: new URL('../../../static/js/managers/DownloadManager.js', import.meta.url).pathname,
+  UI_HELPERS_MODULE: new URL('../../../static/js/utils/uiHelpers.js', import.meta.url).pathname,
+  STATE_MODULE: new URL('../../../static/js/state/index.js', import.meta.url).pathname,
+  I18N_HELPERS_MODULE: new URL('../../../static/js/utils/i18nHelpers.js', import.meta.url).pathname,
+  UTILS_MODULE: new URL('../../../static/js/components/shared/utils.js', import.meta.url).pathname,
+}));
+
+vi.mock(DOWNLOAD_MANAGER_MODULE, () => ({
+  downloadManager: {
+    downloadVersionWithDefaults: vi.fn(),
+  },
+}));
+
+vi.mock(UI_HELPERS_MODULE, () => ({
+  showToast: vi.fn(),
+}));
+
+const stateMock = { global: { settings: { autoplay_on_hover: false } } };
+vi.mock(STATE_MODULE, () => ({
+  state: stateMock,
+}));
+
+vi.mock(I18N_HELPERS_MODULE, () => ({
+  translate: vi.fn((_, __, fallback) => fallback ?? ''),
+}));
+
+vi.mock(UTILS_MODULE, () => ({
+  formatFileSize: vi.fn(() => '1 MB'),
+}));
+
+vi.mock(API_FACTORY_MODULE, () => ({
+  getModelApiClient: vi.fn(),
+}));
+
+describe('ModelVersionsTab media rendering', () => {
+  let getModelApiClient;
+  let fetchModelUpdateVersions;
+
+  beforeEach(async () => {
+    vi.resetModules();
+    document.body.innerHTML = `
+      <div id="model-versions-modal">
+        <div id="versions-tab">
+          <div class="model-versions-tab"></div>
+        </div>
+      </div>
+    `;
+    stateMock.global.settings.autoplay_on_hover = false;
+    ({ getModelApiClient } = await import(API_FACTORY_MODULE));
+    fetchModelUpdateVersions = vi.fn();
+    getModelApiClient.mockReturnValue({
+      fetchModelUpdateVersions,
+      setModelUpdateIgnore: vi.fn(),
+      setVersionUpdateIgnore: vi.fn(),
+      deleteModel: vi.fn(),
+    });
+  });
+
+  afterEach(() => {
+    document.body.innerHTML = '';
+  });
+
+  it('renders video preview when preview URL references a video file in a query parameter', async () => {
+    const previewUrl = '/api/lm/previews?path=%2Fhome%2Fexample%2Fvideo-preview.mp4';
+    fetchModelUpdateVersions.mockResolvedValue({
+      success: true,
+      record: {
+        shouldIgnore: false,
+        inLibraryVersionIds: [2],
+        versions: [
+          {
+            versionId: 2,
+            name: 'v1.0',
+            previewUrl,
+            baseModel: 'SDXL',
+            sizeBytes: 1024,
+            isInLibrary: true,
+            shouldIgnore: false,
+          },
+        ],
+      },
+    });
+
+    const { initVersionsTab } = await import(MODEL_VERSIONS_MODULE);
+    const controller = initVersionsTab({
+      modalId: 'model-versions-modal',
+      modelType: 'loras',
+      modelId: 123,
+      currentVersionId: null,
+    });
+
+    await controller.load();
+
+    const videoElement = document.querySelector('.version-media video');
+    expect(videoElement).toBeTruthy();
+    expect(videoElement?.getAttribute('src')).toBe(previewUrl);
+    expect(document.querySelector('.version-media img')).toBeFalsy();
+  });
+
+  it('renders image preview when preview URL does not reference a video', async () => {
+    const previewUrl = '/api/lm/previews?path=%2Fhome%2Fexample%2Fpreview-image.png';
+    fetchModelUpdateVersions.mockResolvedValue({
+      success: true,
+      record: {
+        shouldIgnore: false,
+        inLibraryVersionIds: [3],
+        versions: [
+          {
+            versionId: 3,
+            name: 'v1.1',
+            previewUrl,
+            baseModel: 'SDXL',
+            sizeBytes: 2048,
+            isInLibrary: true,
+            shouldIgnore: false,
+          },
+        ],
+      },
+    });
+
+    const { initVersionsTab } = await import(MODEL_VERSIONS_MODULE);
+    const controller = initVersionsTab({
+      modalId: 'model-versions-modal',
+      modelType: 'loras',
+      modelId: 456,
+      currentVersionId: null,
+    });
+
+    await controller.load();
+
+    const imageElement = document.querySelector('.version-media img');
+    expect(imageElement).toBeTruthy();
+    expect(imageElement?.getAttribute('src')).toBe(previewUrl);
+    expect(document.querySelector('.version-media video')).toBeFalsy();
+  });
+});