Update README.md (#59)

Install diffusers from source to address #46

Author: Yuancheng-Xu

README.md

@@ -12,7 +12,7 @@ Fine-tune Cog family of video models for custom video generation under 24GB of G
 
 ## Quickstart
 
-Clone the repository and make sure the requirements are installed: `pip install -r requirements.txt`.
+Clone the repository and make sure the requirements are installed: `pip install -r requirements.txt` and install diffusers from source by `pip install git+https://github.com/huggingface/diffusers`.
 
 Then download a dataset: