Improve the data-channels example

examples/data-channels/README.md

@@ -1,36 +1,48 @@
 # data-channels
-data-channels is a Pion WebRTC application that shows how you can send/recv DataChannel messages from a web browser
+data-channels is Pion's sample WebRTC app that lets you send and receive DataChannel messages from a web browser.
+
+## Brief Overview
+This example will result in messages being sent between a browser and a self-hosted data-channels server. The connection is made by grabbing the browser's generated session description, or SDP, and passing it into the server. The server uses the browser's SDP to then return a new SDP from the server based on the browser's SDP. The server's SDP then gets passed back into the browser which confirms the handshake and forms a connection!
+
+Once the connection is established, messages will automatically be sent from the data-channels server to the browser every 5 seconds. The browser has a button that lets you send a message back to the server when you click on it.
 
 ## Instructions
-### Download data-channels
+### 1. Download the data-channels server
 ```
 go install github.com/pion/webrtc/v4/examples/data-channels@latest
 ```
 
-### Open data-channels example page
-[jsfiddle.net](https://jsfiddle.net/e41tgovp/)
+### 2. Open JSFiddle
+[Open this JSFiddle example page.](https://jsfiddle.net/e41tgovp/)
+The top of the JSFiddle example page contains a text box containing your browser's session description (SDP).
+Press `Copy browser SDP to clipboard` or copy the base64 string manually.
 
-### Run data-channels, with your browsers SessionDescription as stdin
-In the jsfiddle the top textarea is your browser's session description, press `Copy browser SDP to clipboard` or copy the base64 string manually and:
-#### Linux/macOS
-Run `echo $BROWSER_SDP | data-channels`
-#### Windows
-1. Paste the SessionDescription into a file.
-1. Run `data-channels < my_file`
+### 3. Send the browser's SDP to the server
+Depending on your OS:
 
-### Input data-channels's SessionDescription into your browser
-Copy the text that `data-channels` just emitted and copy into second text area
+#### Linux/macOS (including WSL)
+In the following command, replace `$BROWSER_SDP` with the copied string.
+Run `echo $BROWSER_SDP | data-channels`.
 
-### Hit 'Start Session' in jsfiddle
-Under Start Session you should see 'Checking' as it starts connecting. If everything worked you should see `New DataChannel foo 1`
+#### Windows
+1. Paste the copied string into a file.
+2. Run `data-channels < my_file`.
+
+### 4. Send the server's SDP back to the browser
+The server will automatically print out a base64 string. Copy it and paste it into the second textbox in the JSFiddle page.
 
-Now you can put whatever you want in the `Message` textarea, and when you hit `Send Message` it should appear in your terminal!
+### 5. Start the session!
+Under Start Session you should see 'Checking' as it starts connecting. If everything worked you should see `New DataChannel foo 1`.
 
 Pion WebRTC will send random messages every 5 seconds that will appear in your browser.
 
-Congrats, you have used Pion WebRTC! Now start building something cool
+### 6. Send a message from the browser to the server!
+You can put whatever you want in the `Message` text area, and when you hit `Send Message` it should appear in your terminal!
+
+## Example finished!
+Congrats, you have used Pion WebRTC! Now start building something cool :)
 
-## Architecture
+## Architecture Overview
 
 ```mermaid
 flowchart TB