Capture Video using OpenCV Python

import cv2
import numpy as np

cap = cv2.VideoCapture(0) # capture first device which is first webcam

while True:
    ret, frame = cap.read()
    cv2.imshow("frame", frame)

    # exit video capture
    if cv2.waitKey(1) & 0xFF == ord("q"):
        break

cap.release()
cv2.destroyAllWindows()

References
https://www.youtube.com/watch?v=Jvf5y21ZqtQ
https://github.com/mhdr/OpenCV/tree/master/002