new_contents: import numpy as np
  import cv2
  
  video = cv2.VideoCapture(0)
  
  while (True):
  
      ret, frame = video.read()
  
      gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
  
      cv2.imshow('frame', gray)
      if cv2.waitKey(1) & 0xff == ord("q"):
          break
  
  video.release()
  cv2.destroyAllWindows()
subject: Add capture video example