In that static system, the force you applied (concentrated moment) is not a torque... It is a classic bending moment in longitudinal direction for the subject beam even though its applied by twisting... Reactions are not created only in this case (simply supported beam) and "similar cases" , but will be created/affected if supports that are unable to rotate freely are present within system. Otherwise element/system reactions wont be affected. Your videos are very visually self explanatory and good, but pls try to speak in a manner that will prevent misunderstandings or similar for starters... Keep on good work
