WhatsApp for Android has been updated and now the app "plays videos right away without waiting for them to download first." I tested this new feature and it works like they say. The video started playing right away while still downloading in the background; a much pleasant experience than staring at the downloading icon. To enjoy this feature, your device must run Android 4.1 and above. And that's not all, the videos will play instantly only if sent from the updated version of WhatsApp. Make sure you tell your friends to update by going to Google Play Store.