Latinas are still making moves in Hollywood. In the independent feature film “ Valentina ,” a series of bureaucratic mishaps dogs a young woman as she tries to complete a simple to-do list at the El Paso-Juarez border. But the film, which earned director Tatti Ribeiro the Someone to Watch Award at this year’s Film Independent Spirit Awards, is less interested in the politics of the border than in the people who live there. How the African Screen Industries Are Turning to Tech — and Each Other —