You delete it from your Tivo after downloading. The Mac version of pyTivo has StreamBaby built in. The Tivos only have less than 1 gig of temp storage for streams, so if you're watching HD recordings, you'll probably hit that quickly. Even on SD recordings, I hit the limit at around 45 minutes of show.. so you have to go past that point and have it rebuffer.. It's useful sometimes…. but if I intend to WATCH the show (rather than skim through it which I do for some shows to find the part I want to keep, which is easier on the Tivo oftentimes), I will use pytivo and copy the recording via the Tivo's UI.