chore: update readme

Author: Gautham495

README.md

@@ -4,9 +4,9 @@
   </picture>
 </a>
 
-# react-native-nitro-cloud-uploader (Beta)
+# react-native-nitro-cloud-uploader (Beta) 
 
-A **React Native Nitro Module** for **reliable, resumable, background-friendly uploads** of large files (audio, video, images, PDFs) to **S3-compatible storage** — built for real production workloads.
+**React Native Nitro Module** for **reliable, resumable, background-friendly uploads** of large files (audio, video, images, PDFs) to **S3-compatible storage** — built for real production workloads.
 
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@@ -32,7 +32,7 @@ npm install react-native-nitro-cloud-uploader react-native-nitro-modules
 > [!IMPORTANT]
 >
 > - All of my users are on **iOS in the US**, so iOS support is complete.
-> - Android support is **not fully implemented yet andd does not work!**.
+> - Android support is **not fully implemented yet andd does not work and should not used for now!**.
 > - PRs for Kotlin / Android support are absolutely welcome!
 
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@@ -45,13 +45,28 @@ npm install react-native-nitro-cloud-uploader react-native-nitro-modules
   </tr>
   <tr>
     <td align="center">
-      <video src="https://github.com/user-attachments/assets/5fa5c82d-054c-46a2-bfec-4a0b4398576f" height="650" width="300" controls></video>
+      <video src="https://github.com/user-attachments/assets/f6c23e68-5e3f-4538-9c78-877208847bfc" height="650" width="300" controls></video>
     </td>
   </tr>
 </table>
 
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+> [!INFO]
+> S3 multipart **PUT** uploads require a **minimum chunk size of 5 MB**, so this library defaults to splitting files into 5 MB parts to prevent upload issues.
+> 
+> You must implement your own backend endpoint to generate the multipart presigned URLs. Once provided, the library automatically handles uploading each part and storing the returned **ETag** values for you.
+
+
+```tsx
+  const BASE_URL = 'https://api.uploader.com/file-uploader';
+  const CREATE_UPLOAD_URL = `${BASE_URL}/create-and-start-upload`;
+  const COMPLETE_UPLOAD_URL = `${BASE_URL}/complete-upload`;
+  const ABORT_UPLOAD_URL = `${BASE_URL}/abort-upload`;
+```
+
+---
+
 ## 🧠 Overview
 
 | Feature                           | Support        |