docs: add sample.mp4

wf-yamaday · web-flow · commit f19a4e9683b6 · 2023-04-12T21:16:59.000+09:00
diff --git a/README.md b/README.md
@@ -5,6 +5,10 @@
 
 This is a simple web application that wraps OpenAI's Chat API.
 
+https://user-images.githubusercontent.com/27722351/231453924-3cf0ef20-4154-4141-b0ca-b9d9f0a50bf6.mp4
+
+<br>
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 The application is designed to be simple and can be used as a starting point for customization.
 For example, this application can be used to create your original web application.
 
