Blame others for your mistakes

The video opened with a guy named Lester and he blamed that the box and guy number 2 was accused as well.Lester was calming that guy #2 didn't offer help and that he was on his break and not being productive.In the end it showed that Lester took the blame for the dropped box. Guy #2 offered to help and clean up and Lester accepted guy #2's help.I thought it told us do not blame each other for your mistakes.