Updated for Build 2014; but made year an input parameter. This is a Python3 script. Require one third-part package (pip install feedparser). To run, just type >> python download_build_talks.py

download_buid_talks.py

#!/usr/bin/python

import os
import urllib.request
import feedparser
import math
import sys


def tofile(title):
    title = title.replace("?", "").replace("", "").replace("/", "-").replace(":", "-").replace(",", "-").replace("<", "").replace(">","").replace("'","")
    return title + ".mp4"
 
def handleunicode(title):
    return title.encode(encoding='ascii',errors='replace').decode(encoding='ascii')


def getsessions(year):
    '''
    This requires feedparser to be loaded. E.g (pip install feedparser)
    '''
    try:
        url = 'http://channel9.msdn.com/Events/Build/{0}/RSS/mp4high?sort=sequential&direction=desc&term=&t=.net&t=asp.net&t=csharp&t=html5&t=javascript&t=jquery&t=mobile-services&t=node.js&t=rest&t=typescript&t=web&t=web-api&t=web-sites&t=winjs&t=android&t=ios&t=html5&t=visual-studio'.format(year)
        rss = feedparser.parse(url)
        return [(tofile(handleunicode(e.title)), e.enclosures[0].href) for e in rss.entries]
    except:

        print("Error reading Session RSS feed")
        print("Url: " + url)
        return []


def reportprogress(blocksRead, blockSize, totalSize):
    downloaded = blocksRead * blockSize
    complete = math.ceil((downloaded / (totalSize * 1.0)) * 100)

    sys.stdout.write("{0:.0f}%".format(complete))
    sys.stdout.write("\r")
    sys.stdout.write("")
    sys.stdout.flush()


def download(sessions):
    sessions.sort()
    for s in sessions:
        fname = s[0]
        url = s[1]
        if not os.path.exists(fname):
            try:
                print("Downloading - " + fname)
                urllib.request.urlretrieve(url, fname, reportprogress)
                print(fname)
            except:
                print("Unable to download " + fname)
        else:
            print("Skiping - " + fname)



if __name__ == '__main__':
    year = input('Which year would you like? ')
    download(getsessions(year))