it's about 25 minutes: 2 times a day 11.30 and 12.30.
it are 2 guys who dance and of course Cruella. The 3 trailers are 3 different sets. The production office the reall set where the movie will be shot and the dressing room of Cruella.
The 2 guys are the producers of the movie in which Cruella will be starring. They phone her in her dressing room, some shots are 'taped'. They don't sing but you hear the 'Cruella De Vill score' on which they do some dancing. 4 persons are taken out of the public to help them shoot the movie.
Sometimes it's quit funny ;-)
A lot of what the show is about will be more obvious if you see the pictures
