Download all screencasts currently free (until 10-4-2018) from www.destroyallsoftware.com

das.py

#!/usr/bin/python
# Download all screencasts currently free (until 10-4-2018) from www.destroyallsoftware.com
# Update to set User-Agent
from bs4 import BeautifulSoup
import os
import requests
headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"
}

cookies = {}
html = requests.get("https://www.destroyallsoftware.com/screencasts/catalog", cookies=cookies, headers=headers).text

soup = BeautifulSoup(html, "html.parser")

for season in soup.find_all('div', class_ = 'container season'):
    season_title = season.find('h1', class_ = "season_title twelve columns").a['name']
    print("Season: {}".format(season_title))
    try:
        os.makedirs("{}".format(season_title))
    except:
        pass

    for episode in season.find_all('div', class_ = "episode"):
        number = episode.find('div', class_ = "number one column").text
        title = episode.find('div', class_ = "title five columns").text
        subtitle = episode.find('div', class_="subtitle four columns").text
        link = episode.find('a')['href']
        download_link = "https://www.destroyallsoftware.com{}/download?resolution=1080p".format(link)
        print("Downloading Episode: {}: {} - {} [{}]".format(number, title, subtitle, download_link))
        title = title.replace(":", " ").replace("/", " ")
        r = requests.get(download_link,cookies=cookies, headers=headers, stream=True)
        if r.status_code == 200:
            with open("{}/{}. {}.mp4".format(season_title, number, title), 'wb') as f:
                for chunk in r.iter_content(1024):
                    f.write(chunk)                    

Hey - It did yesterday when I ran it, I see User-Agent is checked now, so it sets a reasonable looking User-Agent header.
Will also need pip install BeautifulSoup4 and pip install requests