Android and iOS BBM Users have been clamoring for video calling for quite some time, and now its finally here.
In a recent update, RIM announced that video call is almost ready for prime-time; as they launch the feature in their latest BBM BETA version cross-platform.

Though limiting availability to users in Canada and US in other to gather feedback and monitor performance, we realized anyone with the latest BBM version can use VPN to access the feature with no issue.
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Blackberry 10 users already enjoy video calls with Blackberry 10 users over BBM for quite a long time, however we pulled a call through to our inhouse Blackberry 10 device but ended up ringing as a voice call.

RIM did not stipulate if the new feature will be compatible with the BlackBerry 10 version, but we keeping our fingers crossed on that and waiting on the global launch coming up in its July release.

Minimum requirements:
Android: OS 4.4 (KitKat) and higher

iOS: iOS 8 and higher

Source: http://www.appfric.com/2016/05/bbm-video-call-now-available-for.html