Advertisements Had a learning moment tonight. Flipping around channels I saw Tropic Thunder was on. I saw it years ago but wanted to see it again as Avengers made me a Robert Downey Jr fan. Anyway, it was 9:40. So I would miss the first ten minutes. To my surprise the 10 minutes I thought I would miss was recorded. I guess the buffer is larger than 30 minutes once you hit "record".