Use View sets to exports the cameras you want from Revit to Live. The exported views are converted to Points-of-Views in Live.
When sending a project from Revit to the Live service, you have the option to send only the current 3D view, all perspective views, or views from a set. Using View Sets allows you to select only the specific cameras you want, to create points-of-view in Live.
To create/edit a View set:
The 3D views are converted into Points-of-Views in Live. You can use them to navigate through the scene using the View side bar, the top arrows, or the pin markers.