Nope not on the 767-300. Sao Paulo - MIA must have been on 777.
With the price of coach tickets these days, do not expect to see PTV's aboard the 767 300 aircraft soon. All 777's have them and maybe the new 767 300 to be delivered, albeit delayed, will too.
AA, UA and DL pulled out of Boeings Conextion PTV, In flight high speed internet, program too.
When the economy rebounds or coach fares increase, you'll see the PTV's every where. These systems are quite costly now. There has to be a ROI for inflight entertainment.
Maybe in Business and P class? Not coach in the near future.