script.py

import os
import sys
import pafy
import requests


def get_inp():
    url = input("Enter a YouTube video link: ")
    try:
        if (url[:24] != "https://www.youtube.com/") or requests.get(
            url
        ).status_code != 200:
            sys.exit()
    except:
        print(
            "Enter a valid link, make sure it starts with 'https://www.youtube.com/'\nTerminating Program."
        )
        sys.exit()
    return url


def show_details(url):
    global vid
    global best
    vid = pafy.new(url)
    best = vid.getbest(preftype="mp4")
    print(
        f"Title: {vid.title}\nChannel: {vid.author}\nDuration: {vid.duration}\nBest Resolution: {best.resolution}"
    )


def save_vid():
    print("Downloading video in the current direcotry...")
    best.download()


def save_audio():
    print("Downloading audio in the current direcotry...")
    vid.getbestaudio().download()


def save():
    task = input("\nSave Video, Audio, Both or None(v,a,b,n): ")
    if task == "v":
        save_vid()
    elif task == "a":
        save_audio()
    elif task == "b":
        save_vid()
        save_audio()
    elif task != "n":
        print("Incorrect input")


if __name__ == "__main__":
    show_details(get_inp())
    save()