One thing to remember is that Dish Network's satellites at 110 and 119 degrees do not have a footprint outside the continental USA (Dish Network has separate satellites that serve places like Puerto Rico/Virgin Islands). Therefore, I don't think Delta uses the ex-Song 757s on routes outside the CONUS.

Unless they've added satellite transponders, the "Business Elite" 757s (with the 16 160 degree recliners in F/J) have AVOD movies, recorded videos, games and the airshow but no live TV.