A simple guide to download videos from YouTube using python

1. Objectives:
   1. 1. Download YouTube Videos
      2. Saving as subclip (saving a portion of the video)
      3. Converting to MP3
      4.  
2. Required Tools:
   1. 1. PyTube— primarily for downloading youtube videos.
      2. MoviePy — for video editing and also convert to mp3.
      3.  
3. Steps:
   1. pip install pytube and moviepy

Basic Usage

from pytube import YouTube
from moviepy.editor import *

# download a file from youtube
youtube_link = 'https://www.youtube.com/watch?v=yourtubevideos'
w = YouTube(youtube_link).streams.first()
w.download(output_path="/your/target/directory")

# download a file with only audio, to save space
# if the final goal is to convert to mp3
youtube_link = 'https://www.youtube.com/watch?v=targetyoutubevideos'
y = YouTube(youtube_link)
t = y.streams.filter(only_audio=True).all()
t[0].download(output_path="/your/target/directory")

Downloading videos from a YouTube playlist

import requests
import re
from bs4 import BeautifulSoup

website = 'https://www.youtube.com/playlist?list=yourfavouriteplaylist'
r= requests.get(website)
soup = BeautifulSoup(r.text)

tgt_list = [a['href'] for a in soup.find_all('a', href=True)]
tgt_list = [n for n in tgt_list if re.search('watch',n)]

unique_list= []
for n in tgt_list:
    if n not in unique_list:
        unique_list.append(n)

# all the videos link in a playlist
unique_list = ['https://www.youtube.com' + n for n in unique_list]

for link in unique_list:
    print(link)
    y = YouTube(link)
    t = y.streams.all()
    t[0].download(output_path="/your/target/directory")

Converting from MP4 to MP3 (from a folder with mp4 files)

import moviepy.editor as mp
import re
tgt_folder = "/folder/contains/your/mp4"

for file in [n for n in os.listdir(tgt_folder) if re.search('mp4',n)]:
full_path = os.path.join(tgt_folder, file)
output_path = os.path.join(tgt_folder, os.path.splitext(file)[0] + '.mp3')
clip = mp.AudioFileClip(full_path).subclip(10,) # disable if do not want any clipping
clip.write_audiofile(output_path)