download-good-build-2016-videos.ps1

[Environment]::CurrentDirectory=(Get-Location -PSProvider FileSystem).ProviderPath 
$rss = (new-object net.webclient)
#Set the username for windows auth proxy
$rss.proxy.credentials=[system.net.credentialcache]::defaultnetworkcredentials
$a = ([xml]$rss.downloadstring("https://s.ch9.ms/Events/Build/2016/rss?media=True&tag[0]=.net&tag[1]=application-insights&tag[2]=asp.net&tag[3]=azure&tag[4]=csharp&tag[5]=cordova&tag[6]=data&tag[7]=devops&tag[8]=diagnostics&tag[9]=internet-of-things&tag[10]=javascript&tag[11]=machine-learning&tag[12]=managed-languages&tag[13]=node.js&tag[14]=open-source&tag[15]=security&tag[16]=testing&tag[17]=typescript&tag[18]=visual-studio&tag[19]=visual-studio-code&tag[20]=web-platform")) 
$a.rss.channel.item | foreach{  
    try{
        $urlstring=$_."group"."content" | where-object type -eq "video/mp4" | select -ExpandProperty url | where {$_ -notlike "*_mid.mp4"}   | select-object -first 1
        $url = New-Object System.Uri($urlstring) 
        $file = $_.creator + "-" + $_.title.Replace(":", "-").Replace("?", "").Replace("/", "-") + ".mp4"
        if (!(test-path $file)) 
        { 
            $wc = (New-Object System.Net.WebClient)
            #Set the username for windows auth proxy
            $wc.proxy.credentials=[system.net.credentialcache]::defaultnetworkcredentials
            $wc.DownloadFile($url, $file) 
        } 
    }catch{}
}