Easy Way to download youtube videos using python application without using any software

Hi All, Youtube videos donwload seivatharku nam evalavo websites/applications use panirupom athil silavaikal namaku ilavasamaka kidaikum silavai paid version kidaikum athila namaku niraya features irukalam athe samayam namaku sila problems kooda varalam but intha post-il nam pakka irukum youtube application naam sonthamaka develop panna pora applicaton atharkana coding and explanation video keela iruku kandipa parunga...

#needed packages for developing this application
from tkinter import *
#this package is used to download the youtube video
from pytube import YouTube
#this package is used to convert the file size
from hurry.filesize import size
import os
root = Tk()
root.geometry("500x500")
root.configure(background='white')
root.resizable(0,0)
root.title("Youtbe Downloader")
#function that donwload the video from youtube and store in local computer
def Download():
    url = YouTube(str(link.get()))
    video = url.streams.first()
    video.download()
    video_name = video.title
    video_path = os.getcwd()
    video_size = size(video.filesize)
    v_name = "Video Name is : {}".format(video_name)
    v_path = "Video Path is : {}".format(video_path)
    v_size = "Video SIze is : {}".format(video_size)
    Label(root, text = "Video Downloaded", font = "arial 15", fg = "red").place(x = 180, y = 220)
    Label(root, text = v_name, font = "arial 8 bold", fg = "red").place(x = 10, y = 260)
    Label(root, text = v_path, font = "arial 8 bold", fg = "red").place(x = 10, y = 300)
    Label(root, text = v_size, font = "arial 8 bold", fg = "red").place(x = 10, y = 340)

#Tkintr frame window desinging
Label(root, text = "Youtube video downloader", font = "arial 20 bold").pack()
link = StringVar()
Label(root, text = "Paste Your link", font = "arial 15 bold").pack()
link_entry = Entry(root, width = 70, textvariable = link).place(x = 32, y = 90)
Button(root, text = "DOWNLOAD", font = "arial 15 bold", bg = "pale violet red", padx = 2,
                                command =Download).place(x = 180, y= 150)
root.mainloop()

Video Reference :