Pulled the trigger on a 3D printer and am teaching myself how to model using various software. It basically worked out how I wanted, but I can improve.
You mention "indented hole". Is it supposed to just be a recess? Not a through hole?
3d printers can do some bridging, especially a large radius hole. Each layer will have just a little bit more material cantilevered out unsupported. It looks to me that it tried to build support, but hard to say from the video.