The downloaded models should be placen in this folder on Windows: C:\Users\Your_user_name\AppData\Roaming\Blender Foundation\Blender\3.4\scripts\addons\text_to_video-main\model
(I'm constantly running into installation problems, and will wait till ModelScope matures, to continue this project)
(My RTX card isn't detected as a CUDA supported card, so I can't check if this is actually working. So, if it works for you, let me know.)