The quality of the videos is very low but it's still pretty impressive. Full details at the NVIDIA blog.
To give machines a more “imaginative” capability, such as imagining how a wintery scene would look like in the summer, Liu and team used unsupervised learning and generative modeling. An example of their work is shown below, where the winter and sunny scenes on the left are the inputs and the imagined corresponding summer and rainy scenes are on the right.