So, it seems, that your data are not georeferenced. You need to export this model as a mesh. The good idea is to simplify it (not sure how big it is in RealityCapture), texture it and export in format which supports a software, where you want to open it. Then you will need to add there your building model and place it on a surface.
Also, for better terrain model is good to change the way, how you capture the video/images. You can find more there: https://www.youtube.com/watch?v=9e_NLp_FaUk&t=1s