I found the video on another site (still couldn't get it through the link on here). It looks like Yala National Park in Sri Lanka.
@JBZvolunteer: the thing on the truck isn't a fake elephant trunk, it's a snorkel (so the vehicle can drive through deep water). Google "truck snorkel". It didn't look to me like any of the elephants were showing any particular interest in it, they were just grumpy. If it is Yala the animals there - especially the elphants and leopards - get harrassed a lot by the many many vehicles; it is the most popular park in Sri Lanka, featured prominently in all the guide books etc and hence it is the one that all the tourists go to.