If there is a need to ban someone or remove a comment, those should still be seen on the Video on Demand and not edited out as it appears that is happening. It is a good idea to leave these in so that others seeing the repeat will see how strict the mods are on channel, what gets you banned or your comment removed. Then the person can decide to keep watching/sub to the channel. Any viewer late to the stream questioning why a user got banned or a comment removed can go back and see that section on the Video on Demand