So whenever I record my behavior for behavioral cloning, a new .demo file is created and placed in a directory (behavior1.demo, behavior1_0.demo, .., behavior1_99.demo). Each of these files has like 10-15 episodes. My behavior for the agent then uses this directory for behavioral cloning. Now this is fine at a small scale, but lets say I want to get thousands of episodes that I cannot record in one sitting, is there a way to write to an existing demo file or combine .demo files? I want to prevent having too many files but be able to continue adding episodes over a long period of time.