Yes, that video uses the Orbit and Gravity System (the blueprint plugin that is updated to version 4.15), but also requires engine source modification, so that functionality isn’t technically supported until the engine changes are incorporated into Unreal’s code. A thread discussing the engine changes needed is here: Dynamic gravity for characters - Engine Source & GitHub - Unreal Engine Forums
The other project on the store, Orbital Mechanics and Gravity Plugin, is a C++ version. I created it for performance reasons since the plugin requires a lot of math each Tick, but now that blueprints can be baked into c++ I don’t see any reason to use this C++ version.