Complex sentence: Radwinski's second film made its world premiere at the 2015 Toronto International Film Festival, followed by its international premiere at the 66th Berlin International Film Festival and subsequently screened on the festival circuit for over two years.
Split into simpler sentences: Radwinski's second film made its world premiere at the 2015 Toronto International Film Festival, followed by its international premiere at the 66th Berlin International Film Festival. It subsequently screened on the festival circuit for over two years.