There are 2 videos but i think it's the same URL. The first is Paul Rudd & Jason Segel interviewing each other about I Love You Man and the second is hilarious outtakes from that interview including the best rapid fire q&a i've ever seen!
Paul Rudd was amazing in Forgetting Sarah Marshall, just as he is in everything else. Here's the site for the movie, but also a link to a music video for "Inside of You" where you can make dedications. Enjoy