3d Reconstruction using COLMAP and 3DGUT

Operating System:
Windows
Linux

i am working on below link blog :

How to Instantly Render Real-World Scenes in Interactive Simulation | NVIDIA Technical Blog

but after training on my dataset the usdz file not loaded in isaacsim5.0 or isaacsim5.1 and also i try to view .ply file in ply viewer but the output does not match like video

see below example output and input video :
input :

output :

so how to train proper to get 3D world like in video and how to view in isaacsim5.1