Final software adds

README.md

@@ -83,6 +83,10 @@ I love Programming. One of the aims I had when I started ```CodeXam``` was to ma
     * [Textarea](#textarea)
     * [Select Tag](#select-tag)
     * [Implement A Proper Form](#implement-a-proper-form)
+  * [4.Video Embed](#4video-embed)
+    * [iframe Tag](#iframe-tag)
+    * [Video Tag](#video-tag)
+
 
 
 
@@ -110,6 +114,12 @@ A JavaScript file determines the dynamic and interactive elements on the page.
 It determines what happens when users click, hover or type within certain elements. 
 This is kind of like the functionality of the building.
 ```
+## **Use Extension And Software ?**
+
+# [1.VSCODE](https://code.visualstudio.com/)
+# [2.Pretty Formatter](https://marketplace.visualstudio.com/items?itemName=mblode.pretty-formatter)
+# [3.Live Server](https://marketplace.visualstudio.com/items?itemName=ritwickdey.LiveServer)
+
 
 # **Level 1**
 
@@ -1352,7 +1362,7 @@ The ```<select>``` element is most often used in a form, to collect user input.
         <img src="https://github.com/Subham-Maity/html-tutorial-for-beginners/blob/master/5.Images(ignore)/34.png?raw=true"/>
         </p>
 
-## Video Embed 
+## 4.Video Embed 
 
 ### iframe Tag
 website inside website