diff --git a/docs/uni-ad/unimp.md b/docs/uni-ad/unimp.md
index 70921c634a4d85a2fc01d9f405408dc4272b0f20..927baafe8794b9848633c2ea9b904c2223d18174 100644
--- a/docs/uni-ad/unimp.md
+++ b/docs/uni-ad/unimp.md
@@ -8,7 +8,7 @@
 
 利用 uni-ad 多层调度策略动态调整渠道，在设备无广告时自动调整为其他广告渠道以增加广告填充率
 
-<video controls src="https://web-assets.dcloud.net.cn/unidoc/zh/uni-ad/uni-ad-unimp.mp4" style="max-width: 100%; max-height: 70vh;"></video>
+<video controls src="https://web-assets.dcloud.net.cn/unidoc/zh/uni-ad/ad-unimp.x264.mp4" style="max-width: 100%; max-height: 50vh;"></video>
 
 ## 开通流程