So how'd I do it? First, I limited the number of entries to 20 (the original feed has 25). Then I selected just the fields I needed (about 9 or 10, including title, description, duration, etc.).
The result: 20KB. A nearly 90% reduction! It's not just academic—my app sped up noticeably after I tamed this bad boy. I'm saving on two fronts: the payload comes down faster and the app can process it faster.
You can see this feed at work in the reference app for phones.
p.s. Get more tips and tricks (and share your own) by joining the Brightcove App Cloud discussion group on Google.