datasets/README.md

The directory structure is as follows:

```shell
datasets/
└── demo/ 
└── test/
    └── [DatasetName]/
        ├── GT/         # Ground Truth: folder of high-quality frames (one per clip)
        ├── GT-Video/   # Ground Truth (video version): lossless MKV format
        ├── LQ/         # Low-quality Input: folder of degraded frames (one per clip)
        └── LQ-Video/   # Low-Quality Input (video version): lossless MKV format
```

All datasets are available [here](https://drive.google.com/drive/folders/1yNKG6rtTNtZQY8qL74GoQwA0jgjBUEby?usp=sharing).