WhatsApp Red is the only version of the app you can use to send large files. Here's how Whatsapp Es Una Red Social works: On your device, open it and tap on the Settings icon (it looks like a gear). Then tap on Media & Backup in the resulting window.
That will bring you to the 'Media Settings page. Now, hit the blue Choose File button to choose the file to transmit. Once it's uploaded, head back over to your chat window and press the attach button to get started sending your large media files.