diff --git a/app/renderer/control/ControlScenePreview.tsx b/app/renderer/control/ControlScenePreview.tsx
index d8f3cc6..22dafa6 100644
--- a/app/renderer/control/ControlScenePreview.tsx
+++ b/app/renderer/control/ControlScenePreview.tsx
@@ -30,6 +30,7 @@ export function ControlScenePreview({ session, videoRef, onContentRectChange }:
   const rot = scene?.previewRotationDeg ?? 0;
   const isVideo = scene?.previewAssetType === 'video';
   const assetId = scene?.previewAssetType === 'video' ? scene.previewAssetId : null;
+  const autostart = scene?.previewVideoAutostart ?? false;
 
   const [tick, setTick] = useState(0);
   const dur = useMemo(
@@ -38,7 +39,7 @@ export function ControlScenePreview({ session, videoRef, onContentRectChange }:
       if (!v) return 0;
       return Number.isFinite(v.duration) ? v.duration : 0;
     },
-    // tick: перечитываем duration из video ref на каждом кадре RAF
+    // tick: timeupdate / loadedmetadata перечитывают duration и currentTime
     // eslint-disable-next-line react-hooks/exhaustive-deps -- намеренно
     [tick, videoRef],
   );
@@ -55,23 +56,15 @@ export function ControlScenePreview({ session, videoRef, onContentRectChange }:
 
   useEffect(() => {
     if (!isVideo) return;
-    let raf = 0;
-    const loop = () => {
-      setTick((x) => x + 1);
-      raf = window.requestAnimationFrame(loop);
-    };
-    raf = window.requestAnimationFrame(loop);
-    return () => window.cancelAnimationFrame(raf);
-  }, [isVideo]);
-
-  useEffect(() => {
-    if (!isVideo) return;
+    if (!assetId) return;
+    // `target.set` bumps revision and resets anchors; avoid firing on every render.
+    if (vp?.targetAssetId === assetId) return;
     void video.dispatch({
       kind: 'target.set',
       assetId,
-      autostart: scene.previewVideoAutostart,
+      autostart,
     });
-  }, [assetId, isVideo, scene, video]);
+  }, [assetId, isVideo, autostart, vp?.targetAssetId, video]);
 
   useEffect(() => {
     const v = videoRef.current;
@@ -88,7 +81,8 @@ export function ControlScenePreview({ session, videoRef, onContentRectChange }:
     } else {
       v.pause();
     }
-  }, [assetId, vp, videoRef]);
+    // eslint-disable-next-line react-hooks/exhaustive-deps -- avoid reruns on 500ms heartbeats (serverNowMs-only updates)
+  }, [assetId, url, vp?.revision, vp?.targetAssetId, vp?.playing, vp?.playbackRate, videoRef]);
 
   const scrubClass = [styles.scrub, dur ? styles.scrubPointer : styles.scrubDefault].join(' ');
 
@@ -105,6 +99,8 @@ export function ControlScenePreview({ session, videoRef, onContentRectChange }:
           src={url}
           playsInline
           preload="auto"
+          onTimeUpdate={() => setTick((x) => x + 1)}
+          onLoadedMetadata={() => setTick((x) => x + 1)}
         >
           <track kind="captions" srcLang="ru" label="Превью без субтитров" />
         </video>
diff --git a/app/renderer/shared/PresentationView.tsx b/app/renderer/shared/PresentationView.tsx
index 792a7bb..ffda668 100644
--- a/app/renderer/shared/PresentationView.tsx
+++ b/app/renderer/shared/PresentationView.tsx
@@ -53,7 +53,16 @@ export function PresentationView({
     } else {
       el.pause();
     }
-  }, [scene?.previewAssetId, scene?.previewAssetType, vp]);
+    // eslint-disable-next-line react-hooks/exhaustive-deps -- avoid reruns on 500ms heartbeats (serverNowMs-only updates)
+  }, [
+    scene?.previewAssetId,
+    scene?.previewAssetType,
+    previewUrl,
+    vp?.revision,
+    vp?.targetAssetId,
+    vp?.playing,
+    vp?.playbackRate,
+  ]);
 
   return (
     <div className={styles.root}>
diff --git a/app/renderer/shared/video/useVideoPlaybackState.ts b/app/renderer/shared/video/useVideoPlaybackState.ts
index 031db12..114ef99 100644
--- a/app/renderer/shared/video/useVideoPlaybackState.ts
+++ b/app/renderer/shared/video/useVideoPlaybackState.ts
@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react';
+import { useEffect, useMemo, useRef, useState } from 'react';
 
 import { ipcChannels } from '../../../shared/ipc/contracts';
 import type { VideoPlaybackEvent, VideoPlaybackState } from '../../../shared/types';
@@ -9,31 +9,36 @@ export function useVideoPlaybackState(): readonly [
   { dispatch: (event: VideoPlaybackEvent) => Promise<void> },
 ] {
   const api = getDndApi();
-  const [state, setState] = useState<VideoPlaybackState | null>(null);
-  const [timeOffsetMs, setTimeOffsetMs] = useState(0);
-  const [clientNowMs, setClientNowMs] = useState(() => Date.now());
-
-  useEffect(() => {
-    if (!state) return;
-    const id = window.setInterval(() => {
-      setClientNowMs(Date.now());
-    }, 250);
-    return () => window.clearInterval(id);
-  }, [state]);
+  const [playback, setPlayback] = useState<VideoPlaybackState | null>(null);
+  /** serverNowMs − Date.now() at last IPC sync; lets us compute a live clock without React timers. */
+  const timeOffsetMsRef = useRef(0);
 
   useEffect(() => {
     void api.invoke(ipcChannels.video.getState, {}).then((r) => {
-      setState(r.state);
-      setTimeOffsetMs(r.state.serverNowMs - Date.now());
+      timeOffsetMsRef.current = r.state.serverNowMs - Date.now();
+      setPlayback(r.state);
     });
     return api.on(ipcChannels.video.stateChanged, ({ state: next }) => {
-      setState(next);
-      setTimeOffsetMs(next.serverNowMs - Date.now());
+      timeOffsetMsRef.current = next.serverNowMs - Date.now();
+      setPlayback((prev) => {
+        if (prev?.revision === next.revision) return prev;
+        return next;
+      });
     });
   }, [api]);
 
+  const state = useMemo((): VideoPlaybackState | null => {
+    if (!playback) return null;
+    return {
+      ...playback,
+      get serverNowMs(): number {
+        return Date.now() + timeOffsetMsRef.current;
+      },
+    };
+  }, [playback]);
+
   return [
-    state ? { ...state, serverNowMs: clientNowMs + timeOffsetMs } : null,
+    state,
     {
       dispatch: async (event) => {
         await api.invoke(ipcChannels.video.dispatch, { event });
diff --git a/app/shared/video/videoPlaybackLoop.networkRegression.test.ts b/app/shared/video/videoPlaybackLoop.networkRegression.test.ts
new file mode 100644
index 0000000..8ee2549
--- /dev/null
+++ b/app/shared/video/videoPlaybackLoop.networkRegression.test.ts
@@ -0,0 +1,17 @@
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import path from 'node:path';
+import test from 'node:test';
+import { fileURLToPath } from 'node:url';
+
+const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..', '..', '..');
+
+void test('video playback: control preview does not dispatch target.set on every render', () => {
+  const src = fs.readFileSync(
+    path.join(root, 'app', 'renderer', 'control', 'ControlScenePreview.tsx'),
+    'utf8',
+  );
+  // Регресс: зависимость `[... , scene, ...]` заставляла эффект с `target.set` срабатывать постоянно,
+  // сбрасывая видео (доля секунды проигрывается и начинается сначала).
+  assert.doesNotMatch(src, /\]\s*,\s*\[\s*[^\]]*\bscene\b/);
+});
diff --git a/app/shared/video/videoPlaybackPerf.networkRegression.test.ts b/app/shared/video/videoPlaybackPerf.networkRegression.test.ts
new file mode 100644
index 0000000..850e7de
--- /dev/null
+++ b/app/shared/video/videoPlaybackPerf.networkRegression.test.ts
@@ -0,0 +1,24 @@
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import path from 'node:path';
+import test from 'node:test';
+import { fileURLToPath } from 'node:url';
+
+const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..', '..', '..');
+
+void test('video playback: renderer hooks/components do not tick React each frame', () => {
+  const hookSrc = fs.readFileSync(
+    path.join(root, 'app', 'renderer', 'shared', 'video', 'useVideoPlaybackState.ts'),
+    'utf8',
+  );
+  // Регресс: раньше был setInterval(250ms) для clientNowMs, который заставлял перерисовываться окна.
+  assert.doesNotMatch(hookSrc, /\bsetInterval\s*\(/);
+
+  const previewSrc = fs.readFileSync(
+    path.join(root, 'app', 'renderer', 'control', 'ControlScenePreview.tsx'),
+    'utf8',
+  );
+  // Регресс: раньше был RAF loop с setState на каждом кадре.
+  assert.doesNotMatch(previewSrc, /\brequestAnimationFrame\s*\(\s*loop\s*\)/);
+  assert.doesNotMatch(previewSrc, /\brequestAnimationFrame\s*\(\s*loop\b/);
+});
diff --git a/package.json b/package.json
index 0562857..edd2f6b 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "build:obfuscate": "node scripts/build.mjs --production --obfuscate",
     "lint": "eslint . --max-warnings 0",
     "typecheck": "tsc -p tsconfig.eslint.json --noEmit",
-    "test": "tsx --test app/renderer/shared/ui/controls.tooltip.test.ts app/shared/ipc/contracts.mediaRemoval.test.ts app/shared/effectEraserHitTest.test.ts app/renderer/control/controlApp.effectsPanel.test.ts app/renderer/shared/effects/PxiEffectsOverlay.pointer.test.ts app/main/windows/createWindows.editorClose.test.ts app/main/windows/bootWindow.test.ts app/main/effects/effectsStore.test.ts app/main/project/assetPrune.test.ts app/main/project/zipRead.test.ts app/shared/package.build.test.ts app/shared/license/canonicalJson.test.ts app/shared/license/productKey.test.ts app/shared/license/licenseService.networkRegression.test.ts app/main/license/verifyLicenseToken.test.ts && node --test scripts/build-env.test.mjs scripts/obfuscate-main.test.mjs",
+    "test": "tsx --test app/renderer/shared/ui/controls.tooltip.test.ts app/shared/ipc/contracts.mediaRemoval.test.ts app/shared/effectEraserHitTest.test.ts app/renderer/control/controlApp.effectsPanel.test.ts app/renderer/shared/effects/PxiEffectsOverlay.pointer.test.ts app/main/windows/createWindows.editorClose.test.ts app/main/windows/bootWindow.test.ts app/main/effects/effectsStore.test.ts app/main/project/assetPrune.test.ts app/main/project/zipRead.test.ts app/shared/package.build.test.ts app/shared/license/canonicalJson.test.ts app/shared/license/productKey.test.ts app/shared/license/licenseService.networkRegression.test.ts app/shared/video/videoPlaybackPerf.networkRegression.test.ts app/shared/video/videoPlaybackLoop.networkRegression.test.ts app/main/license/verifyLicenseToken.test.ts && node --test scripts/build-env.test.mjs scripts/obfuscate-main.test.mjs",
     "format": "prettier . --check",
     "format:write": "prettier . --write",
     "release:info": "node scripts/print-release-info.mjs",