Perspective affects the path of the aircraft and the length of its body equally; so it is travelling in excess of 8*63m in 2 seconds, that's 504/2=252m/s=490 knots.
If you can up your estimate to more than 512 knots, you'd have proven the aircraft is not a Boeing 777-200, but rather a shorter model, as 512 knots is its maximum speed. I expect the aircraft would need to descend to exceed it, and would be in danger of disintegrating.
Typical Cruise Speed: Mach 0.84 (905 km/h, 490 knots) at a cruise altitude of 35,000 ft (11,000 m)
Maximum Cruise Speed: Mach 0.89 (950 km/h, 512 knots) at a cruise altitude of 35,000 ft (11,000 m)
It is physically impossible to fly a standard rate turn of 360⁰/2 min (as in the satellite video) with only 30⁰ bank with a speed in excess of 250 knots.