If it's a 747-400 (with winglets) from the UAE then it's registration A6-YAS, quite a new 747 delivered to the UAE Royal Flight in Abu Dhabi in late 1999, after 12 months of fitting out (takes time to install those gold taps).
The UAE Royal Flight has sufficient aircraft to run an airline with ! No less than four 737-BJ, an A300, a 767, a Boeing 747SP (the one with the short fuselage) and top of the range this 747-400. They're all fitted out ultra-VIP inside. Rather puts Air Force 1 with it's rows of regular seats for accompanying staff to shame !