import cv2 as cv
import random

cap = cv.VideoCapture('file_name.avi')

random_frame = random.randint(1,99999)

cap.set(cv.CAP_PROP_POS_FRAMES,random_frame)

ret, frame = cap.read()

cv.imshow("random_frame",frame)

while cap.isOpened():
    if cv.waitKey(1) == ord('q'):
        break

cap.release()
cv.destroyAllWindows()