I don't know the exact config on this plane as it's probably a custom design since Donatas is a well-known pilot in F3P indoor aerobatic competition. I fly small scale outdoor 3D aero and based on what I see it doing, I think it's traditional control surfaces, rudder, elevator and ailerons plus two additional elements: a variable pitch propeller and a thrust vectored motor.
VPP and thrust vectoring are two separate elements which do different things. A variable pitch propeller can reverse the propeller from pulling the plane forward to pushing it backward. That's what enables diving toward the ground and almost instantly reversing to start going back up. Thrust vectoring dynamically changes the angle of the motor allowing the plane to turn in an even tighter radius than a large rudder can alone. The turn can be so tight it's less than the length of the plane, technically becoming a spin.
In fixed wing RC aerobatics, thrust vectoring (TV) isn't a feature of the motor itself, it's actually a feature of the mount the motor is attached to, which can pivot left/right ~20 deg. A rudder changes the direction of travel by pushing the tail to the left from the rear indirectly causing the nose to turn toward the right. A thrust vectored motor mount increases the rate of turn by also angling the motor to directly 'pull' the nose toward the new direction. In RC the angle is usually changed mechanically by extending the rudder servo control rod forward to the pivoting motor mount and reversing the connection point so the motor pulls the nose toward the opposite direction the rudder is pushing the tail.
As a 3D pilot looking at the video, Donatas is doing things which are wildly impressive and, if you don't know about VPP and thrust vectoring, look impossible. Before we even get into VPP and TV, the first amazing thing about the video is simply the airspeed. I fly very lightweight 3D planes and the video looks slo-mo even to me. That size of plane shouldn't be able to stay in the air moving that slowly. F3P indoor-only competition planes are hand-crafted insanely light from esoteric materials using clever engineering tricks to sustain torsional rigidity. They sweat over every gram to maximize the cubic wing loading.
Second, is the insane piloting skill on display. Carving those perfectly straight lines and precisely uniform arcs so slowly in such a small volume takes years of practice. That perfection is what F3P competitions judge. Last is leveraging the VPP stopping the the plane in midair and moving back upward. Keeping the plane perfectly vertical on that down line is already like balancing an ice pick on your fingertip. Stopping and moving up is next level. The video is probably from an exhibition as I don't think they fly VPP props in F3P competition since they're heavier and these guys even test the strength vs weight of dried glues to save tenths of grams.