Coincidentally, less than 10 minutes before the discussion of the findings on this show, I had saved the online article in Nature about it. I was glad to be able to watch the video on TV instead of online.
According to the article, it's not clear if these rats actually displayed "empathy" - and there's even discussion among scientists about how to define this key word. It's a complex topic!
Stay tuned to more research and reports about it.