There’s a new film festival in town, offering six films from around the world about people with disabilities. REELAbilitiesBoston Film Festival, presented by the long-running Boston Jewish Film Festival, premieres Thursday and runs through Feb. 8 at several local venues. Boston is the fifth city in the country to sponsor REELAbilities, a national film fest launched in New York in 2007. The event opens with “My Spectacular Theatre,’’ from China, on Thursday, at the Perkins School for the Blind, in Watertown. Directed by Yu Lang, “My Spectacular Theatre’’ is about a young man who finds refuge in a Beijing movie theater where all of the patrons are blind.