I'd love to know how to do this as well. 

THEY BETTER NOT ADD THAT! I just spent most of the past week going through and downloading all endurance runs and organizing them all nice.

Well, there is this page:  http://www.giantbomb.com/videos/feed-index/

" Well, there is this page:  http://www.giantbomb.com/videos/feed-index/ "

I hope not, considering Dave always uses Persona 4 as the example for endurance run downloads. 

RSS is just one big XML file. If they included every video, that file would be quite large. Feeds typically do not contain every piece of content ever published. Giant Bomb has an API you can use if you want access to every video ever published, but you can't filter the results or even obtain information on what type of video it is. So if you want Endurance Runs you'd have to go through each page, pulling out data if it has "Endurance Run" in its name. Yuck. It's unpleasant work, but that's the API that's available.

@LordAndrew:
Well, atleast now and I know, and knowing is half the battle. 
The other half is shooting people.