Video game soundtracks have come a long way since the bleeps and bloops of the 1980s. Huge orchestral scores are now part and parcel of the gaming experience, which is one of the biggest entertainment industries in the world world. Jesper Kyd is a Danish composer and sound designer who is known for his iconic scores for games like Hitman, Assasin's Creed and many more.
In the video he cites Vangelis, Jean-Michel Jarre and the early video game Demoscene as influences on his music. If you want to dig a little deeper, there's a documentary on his journey to becoming a renowned video game composer here:
Classic single VCO mono synth
From military deployment to the MicroKorg
With new looping firmware for Cosmos
Full Hydrasynth engine, smaller package