Since the era of video calls started, we have been making video calls through many ways including the use of Skype, Hangouts and Facebook Messenger. This is a good development from them and if you're still married to BlackBerry's declining ecosystem, you can make video calls to your Android and iOS friends through BBM Messaging app.
There’s no sign-up or approval required to use the feature. When you tap the icon to initiate a call with one of your BBM contacts, BBM will ask whether you want to make a voice call or try a video call with the beta feature .
This feature was made available to US and Canada only in early May while still in its beta stage, and now BBM users in Africa and other countries (but not all)can now make video calls on their Android or iOS devices.
Android: OS 4.4 (KitKat) and higher
iOS: iOS 8 and higher
Though BB10 users have been rocking this feature for long and Blackberry just decided to bring forgotten Android and iOS users into the fold.