Update app.py

app.py

@@ -13,6 +13,7 @@ from hyvideo.utils.preprocess_text_encoder_tokenizer_utils import preprocess_tex
 from hyvideo.config import parse_args
 from hyvideo.inference import HunyuanVideoSampler
 from hyvideo.constants import NEGATIVE_PROMPT
+from diffusers import HunyuanVideoPipeline, HunyuanVideoTransformer3DModel
 
 from huggingface_hub import snapshot_download