Now takes on video's claims to immediacy and authenticity, as Benglis juxtaposes live performance with her own prerecorded image. The soundtrack features phrases such as "now!" and "start recording," commands that usually ground us in the present, but here serve to deepen the confusion between live signals and mediation. Repeated takes and acidic color processing heighten this challenge to video's power of "liveness."

• Lynda Benglis