It's Mozart's birthday. We've been indulging in some Don Giovanni here amid (but inside, protected from) the snow. But for multimedia instead of fireside consumption, I thought this effortlessly electric encore by Heifetz would serve nicely. Wonderful how relaxed he is; how much he gets done doing so little with either hand. Nothing extra, nothing unnecessary -- but a ton of music.
Sci/med significance: Music is good for you.