Update download scripts and folder name

apps/vanilla-app/README.md

@@ -0,0 +1,28 @@
+# Browser Examples
+
+## Setup
+
+You need to download assets from npm before running the examples:
+
+```bash
+$ npm run download
+```
+
+## Run
+
+To run this example, execute:
+
+```
+$ npm start
+```
+
+Visit http://localhost:8080 to check avaiable examples.
+
+## Examples
+
+| Example | Description |
+| ------- | ----------- |
+| transcode.html | Transcoding example |
+| transcode.esm.html | Transcoding example using module |
+| trim.html | Video trimming exmple |
+| concatDemuxer.html | Video concat exmple |