Add nltk download

run_demo_low_api_openai.py

@@ -15,9 +15,13 @@ import pytube as pt
 import torch
 import whisper
 from huggingface_hub import hf_hub_download, model_info
-from nltk.tokenize import sent_tokenize
 from transformers.utils.logging import disable_progress_bar
 
+import nltk
+nltk.download("punkt")
+
+from nltk.tokenize import sent_tokenize
+
 warnings.filterwarnings("ignore")
 disable_progress_bar()