As discussed by the folks in the video, following the first landing, it was too slow for the angle of attack used, which in itself they agreed was too low as well. The second landing, as you can see in the video, was quite good and well handled, while also done in the grass for more controllable ground handling. As you can see in the video, the aircraft's torque effect really becomes pronounced as the aircraft's speed reduces, and at the same time the rudder becomes less effective, and the first landing, with the airspeed too low and close to stall speed coming over the threshold, it quickly became squirly as a result - but controlled by the pilot none-the-less, and he kept it under control. On the second landing, the speed was kept up and it made a very nice approach and landing. It will be great to see this aircraft fly when the pilots have more time and familiarity with the handling, which is of course a great learning experience in an aircraft design that no one has flown before.
Although it is a 3/4 replica, this aircraft took 16-years to build, and is a tremendous engineering accomplishment, and no doubt one of the more complex 'home-builds' one could imagine. It is very cool to see such a project completed.