Disable WhatsApp Notification while watching YouTube

Is it possible to disable WhatsApp Status bar notifications when I am watching YouTube videos on a Android device?

I don't want to disable WhatsApp notifications in any other conditions, but only when I am watching YouTube videos.

I know it is possible to disable notifications of App (like WhatsApp), but that will block it for all the time. This I don't want to happen. I would like to continue receive WhatsApp notifications but not when I am watching YouTube.

My Device: Micromax Canvas 4

Android OS: 4.2

Is this possible?