Totalitarian governments develop mass propaganda and perfect the art of misinformation and manipulation. Propaganda uses all the media of communication: press, poster, radio, cinema, It always simplifies the doctrine in some striking slogans repeated tirelessly, it glorifies the chief.
Those regimes also organize large gatherings of crowds, parades and ceremonies. On the other hand, the intellectual and artistic life must be integrated into the project of the ideology, the creation is thus strictly controlled.
Yes they do.
Even if they can't, they can manipulate the pictures and virtually add more people to their gatherings. They have done this in Venezuela.