rename video model column

backend/app/app/models/video.py

@@ -1,6 +1,6 @@
 from typing import TYPE_CHECKING
 
-from sqlalchemy import Column, ForeignKey, Integer, String, Enum
+from sqlalchemy import Column, ForeignKey, Integer, String, Enum, DateTime
 from sqlalchemy.orm import relationship
 
 from app.db.base_class import Base
@@ -17,6 +17,7 @@ class Video(Base):
   progress_state = Column(String(10), 
                     ForeignKey("progress.state", ondelete="RESTRICT", onupdate="CASCADE"),
                     default="waiting")
-  time = Column(Integer)
+  created_date = Column(DateTime)
+  length = Column(Integer)
   owner_id = Column(Integer, ForeignKey("user.id"))
   owner = relationship("User", back_populates="videos")