The Yang taiji 24 form was created by the Chinese Sports Committee in 1956. Four taiji teachers put it together from the Yang family 108 form. Being shorter than the long form, it is quicker to learn and to perform. It was promoted by the People's Republic of China for the population's general health and according to Wikipedia, also taught to internees at communist re-education camps. The form retains many of the movements of the long form, so it is not a simpler form in difficulty, just shorter.
Here is a link to a modern stylist performing the 24 form.
I changed the 24 form somewhat to be more in harmony with traditional Yang taiji. Also some moves are modified, for my older students so for example the snake does not creep quite so low. In traditional taichi we do not kick higher than the waist and the movements in general are more subtle.
Link to my 24 form.
Here is a link to a modern stylist performing the 24 form.
I changed the 24 form somewhat to be more in harmony with traditional Yang taiji. Also some moves are modified, for my older students so for example the snake does not creep quite so low. In traditional taichi we do not kick higher than the waist and the movements in general are more subtle.
Link to my 24 form.