Complex sentence: While trying to success in the film industry one of his contacts started working in video games, which gave him the chance to make the first demos for comercial projects and got him the first gig, Supermagical.
Split into simpler sentences: While trying to success in the film industry one of his contacts started working in video games. This, gave him the chance to make the first demos for comercial projects and was the key to get the first gig, Supermagical.