Voice 2: Hi Hats pattern (should be 16 beats, can only do 8 with Tetra)
Voice 3: Doppler Effect Space Ship sound with modwheel pitch bend
Voice 4: "Analog Squishiness"
The video is interesting not because of the accuracy of White's cover, but because of the way it demonstrates how careful programming can let you get a lot of music out of a relatively cheap, but powerful, synth.