download all the videos on vimcasts.org in mp4 format

vimcasts_scraper.py

import json, urllib2

response = urllib2.urlopen("http://media.vimcasts.org/videos/index.json")
data = json.load(response)

number_of_videos = data.keys()
number_of_videos.sort(key=int)

urls = []
file_names = []

for i in range(1, int(number_of_videos[-1]) + 1):
    file_n = (data[str(i)]["quicktime"]["url"])[(data[str(i)]["quicktime"]["url"])
        .find("videos/") + 7:]  # videos/
    urls.append(data[str(i)]["quicktime"]["url"])

    num = file_n[:file_n.find("/")]
    file_name = (file_n[file_n.find("/") + 1:])

    file_names.append(num + "-" + file_name)

for count, url in enumerate(urls):
    file_name = file_names[count]
    u = urllib2.urlopen(url)
    f = open(file_name, 'wb')
    meta = u.info()
    file_size = int(meta.getheaders("Content-Length")[0])
    # massive overkill.. heh
    print "Downloading: %s Bytes: %s" % (file_name, file_size)

    file_size_dl = 0
    block_sz = 8192
    while True:
        buffer = u.read(block_sz)
        if not buffer:
            break

        file_size_dl += len(buffer)
        f.write(buffer)
        status = r"%10d  [%3.2f%%]" % (file_size_dl, file_size_dl * 100. / file_size)
        status = status + chr(8)*(len(status)+1)
        print status,

    f.close()