The airplane is an FMA IA 63, an Argentinian trainer jet that can also fight in combat. I don't know what speed he is pushing, but this 31-foot wingspan bird can reach 442 knots (509mph, 819km/h) at almost 23,000 feet. One thing is for sure: By the looks of it, it can't be flying much higher than one meter from the ground at the lowest point.
He is the craziest person I've seen in months! I wonder what he was thinking while doing that.Anyway he seems to be quite skilled pilot.Hope you enjoy the video!