Nazzil 2.1 — Windows x64 beta

Install: open the installer and confirm. Launch Nazzil from the desktop shortcut. The Windows app and extension currently use Arabic labels; this English guide describes their controls. Internet access is required on first launch to download yt-dlp and FFmpeg. Node.js is bundled.

Browser extension: right-click the Nazzil system-tray icon and choose browser setup. Select Opera, Chrome or Edge and open its extensions page. Enable Developer mode, click Load unpacked, and select the browser-extension folder offered by the app. Refresh video pages. The extension is not yet store-listed.

The download button appears outside a visible video when space is available. Click × to hide it across sites. To restore it, open the extension toolbar icon and enable the checkbox. You can also start a download from that popup or paste a link into the app.
Choose an available video resolution up to 4K, or MP3 audio only. Video with audio is usually merged into MKV. Only one inspection or download runs at a time. Not all sites or protected/private videos are supported. Download only content you own or are allowed to download.

Keep the app and browser running during downloads. Use the app's Save file link or the browser downloads folder. Local copies and partial files may remain in %LOCALAPPDATA%\Tanzeel4K\app-1.

Updates: exit the app from its tray menu, install a newer release, reload the extension and refresh your video pages. There are no automatic updates.
Removal: Windows Settings > Apps > Nazzil > Uninstall. Remove the browser extension separately. Your media and app data are retained.

This is an unsigned beta, not a release tested on every device or approved by a browser store. Do not disable Windows protection to run it. The app has no active advertising or subscription; the download website is connected to Google AdSense.