how can we record a video file from our program output (moving object)

[Zhaleh]

Hi everybody. I've created a moving object and now I need to record it as a video to use it in another website. I looked youtube videos but I couldn't find anything. I appreciate it a lot if anybody here can help me.
Here is my code:

import pygame

pygame.init()
screen=pygame.display.set_mode((1000,1000)) 

pygame.display.set_caption('visual rhythm')
icon=pygame.image.load("song.png")
pygame.display.set_icon(icon)

playerImg=pygame.image.load('spaceship.png')
playerX=370
playerY=400
def player(x,y):
    screen.blit(playerImg,(int(x),int(y)))

speed=[4000, -2000 , 2000 , -1000 , 1333 , -4000]
count=0
count2=0
clock=pygame.time.Clock()
while count2<len(speed):
    screen.fill((0,255,0))
    milli=clock.tick()
    seconds=milli/1000.0
    dm=seconds*speed[count]
    playerY+=dm
    player(playerX,playerY)
    pygame.display.update()
    if playerY>=946 or playerY<1:
        count+=1
        count2+=1