Hello,
You’ll find a very nice and powerful script for downloading Channel 9 videos on Technet.If you want to use it to download Ignite records, you’ll need to add this line on line 998 :
[void]$combobox1.Items.Add("http://s.ch9.ms/Events/Ignite/2015/RSS/mp4high")
The files names will contains speaker names and session titles :
A lot of Ignite session are already available right now.