ActiveVideo, the joint Arris and Charter Communications venture injecting legacy set tops with software for supporting OTT features, has teamed up with Dutch app developer Metrological to expand on its Latin American deployment roadmap. ActiveVideo itself seems to have supplied the UI side of the equation in similar joint product launches and deployments. Like ActiveVideo’s previous projects, it is supplying its CloudTV virtualization software for retrofitting a new cloud-based VoD UI into older set tops, clearly a step in the direction of full cloud-based TV, and this week it welcomed Metrological’s Application Platform. We suspect the relationship between ActiveVideo may have blossomed from the recent deployment of Metrological’s Application Platform on Arris set tops at Portuguese operator NOS, impressing Arris…