Yes, All you will need to do is select the camera angle you wish to use. Select the footage clip in the slot in the compositor and place objects around the scene, and all masking will be taken care of using the provided photoscan of the abbey.

All the footage was shot on DJI mini 3 at 4K 30fps

Sadly, no, The reconstruction shown in the video will not be provided with the template. There are assets included to help build another abbey encase this is something you are looking to do.