With the context given, i.e. without knowing what type of facility is being build under the project, it's hard to figure out what could be meant under "медиакуб", as the terms seems to be used rather loosely in Russian sources.

For a sports arena, an exchange trade floor, an airport, or a rail station, i.e. for any sort of facility where such "медиакуб" would have multiple "экраны" to display info for hundreds or thousands of people looking from all directions, it can be "медиакуб" like here:

http://www.proline.ru/projects/sc/24.html

That's why I suggest separate words, without capitalization, to avoid references to any companies with names containing MediaCub, MediaCube, etc.