diff --git a/docs/en/module/sim800.md b/docs/en/module/sim800.md
index e11a7ea1..74fa820b 100644
--- a/docs/en/module/sim800.md
+++ b/docs/en/module/sim800.md
@@ -84,7 +84,7 @@ Serial2.print("AT+TEST=TXLRPKT,"00 00 01 00 00 AF 80 07 02 00 00 39"");
**SIM800L Case - Phone calling**
-
+
**SIM800L Case - Receive SMS**
diff --git a/docs/en/unit/butterfly.md b/docs/en/unit/butterfly.md
index 6eff6174..3d23be17 100644
--- a/docs/en/unit/butterfly.md
+++ b/docs/en/unit/butterfly.md
@@ -4,7 +4,7 @@
***
-:memo:**[Description](#Description)** :bulb:**[Assembly](#Assembly)** 🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-Official-Rubber-Band-Powered-Butterfly-Launcher-with-SERVO-control-and-GROVE-Cable-Adapter-Children-s/3226069_32956965036.html?spm=2114.12010615.8148356.2.486b2682Z5xogF)**
+:memo:**[Description](#Description)** :bulb:**[Assembly](#Assembly)** 🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-Official-Rubber-Band-Powered-Butterfly-Launcher-with-SERVO-control-and-GROVE-Cable-Adapter-Children-s/3226069_32956965036.html?spm=2114.12010615.8148356.2.486b2682Z5xogF)** :clapper:**[Related Video](#Related-Video)**
## Description
@@ -26,4 +26,14 @@ Assemble "butterfly", control the Servo Motor to **30 degree**, then bind "butte
-
\ No newline at end of file
+
+
+## Related Video
+
+**Assembly of BUTTERFLY**
+
+
+
+**Demonstration of BUTTERFLY**
+
+
\ No newline at end of file
diff --git a/docs/en/unit/esp32cam.md b/docs/en/unit/esp32cam.md
index eab56abc..f8deacc0 100644
--- a/docs/en/unit/esp32cam.md
+++ b/docs/en/unit/esp32cam.md
@@ -158,7 +158,7 @@ Because the module can generate WIFI hotspot AP, So you can use your mobile phon
**ESP32CAM Case - 01**
-
+
**M5Camera Case - 02**
diff --git a/docs/ja/module/sim800.md b/docs/ja/module/sim800.md
index 9bd4efea..f7163216 100644
--- a/docs/ja/module/sim800.md
+++ b/docs/ja/module/sim800.md
@@ -71,7 +71,7 @@ M5Stackシリーズのコアを使用し、Blockly、Arduino、MicroPythonでプ
**SIM800L デモ - 電話をかける**
-
+
**SIM800L デモ - SMS受信**
diff --git a/docs/ja/unit/esp32cam.md b/docs/ja/unit/esp32cam.md
index 1fd6f315..6c18b5b9 100644
--- a/docs/ja/unit/esp32cam.md
+++ b/docs/ja/unit/esp32cam.md
@@ -152,7 +152,7 @@
**ESP32CAM デモ - 01**
-
+
**M5Camera デモ - 02**
diff --git a/docs/zh_CN/module/sim800.md b/docs/zh_CN/module/sim800.md
index 926730f0..f1c31e00 100644
--- a/docs/zh_CN/module/sim800.md
+++ b/docs/zh_CN/module/sim800.md
@@ -80,7 +80,7 @@ Serial2.print("AT+TEST=TXLRPKT,"00 00 01 00 00 AF 80 07 02 00 00 39"");
**SIM800L 的演示 - 拔打电话**
-
+
**SIM800L 的演示 - 接收短信**
diff --git a/docs/zh_CN/unit/butterfly.md b/docs/zh_CN/unit/butterfly.md
index 24e53ad5..3d4d1756 100644
--- a/docs/zh_CN/unit/butterfly.md
+++ b/docs/zh_CN/unit/butterfly.md
@@ -4,7 +4,7 @@
***
-:memo:**[描述](#描述)** :bulb:**[装配](#装配)** 🛒**[购买链接](https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-1172588106.10.63fb425eBx48kT&id=583025433070)**
+:memo:**[描述](#描述)** :bulb:**[装配](#装配)** 🛒**[购买链接](https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-1172588106.10.63fb425eBx48kT&id=583025433070)** :clapper:**[相关视频](#相关视频)**
## 描述
@@ -26,4 +26,14 @@
-
\ No newline at end of file
+
+
+## 相关视频
+
+**BUTTERFLY 的组装**
+
+
+
+**BUTTERFLY 的演示**
+
+
\ No newline at end of file
diff --git a/docs/zh_CN/unit/esp32cam.md b/docs/zh_CN/unit/esp32cam.md
index 06dacef7..32f2f434 100644
--- a/docs/zh_CN/unit/esp32cam.md
+++ b/docs/zh_CN/unit/esp32cam.md
@@ -161,7 +161,7 @@
**ESP32CAM case - 01**
-
+
**M5Camera 的应用 - 02**
diff --git a/docs/zh_CN/unit/light.md b/docs/zh_CN/unit/light.md
index 69bb702c..2d1f8747 100644
--- a/docs/zh_CN/unit/light.md
+++ b/docs/zh_CN/unit/light.md
@@ -8,7 +8,7 @@
## 描述
-**LIGHT** 是一款集成**光敏电阻和 10K 的可调电阻**的 Unit。光敏电阻接收到环境中不同强度光线后，电阻率会发生变化。接收的光越强，电阻率越小。反之，越大。你可以旋转可调电阻，改变调节光线强度触发 Unit 输出高或低电平的光强阈值。
+**LIGHT** 是一款集成**光敏电阻和 10K 的可调电阻**的 Unit。光敏电阻对光线十分敏感，其在无光照时，呈高阻状态，10K，光照越强，阻值就越低，随着光照强度的升高，电阻值迅速降低，电阻值可小至 1K 欧姆以下。你可以旋转可调电阻，改变调节光线强度触发 Unit 输出高或低电平的光强阈值。
该 Unit 的 GRVE 接口可以输出数字信号或者光强对应的模拟信号(电压信号)。在光照弱的时候，数字引脚输出高电平，即数字信号 "1" ，否则输出 "0" 。