1 1.0 is normal speed, 0 is stopped, numbers between 0 and 1.0 are slower playback, negative numbers are rewind and numbers higher than 1.0 are faster playback.  The forward and backward buttons to the right of Play speed are for moving videos frame by frame.
Slow Food Movement. An international movement begun by Carlo Petrini with a forerunner organisation, Arcigola, founded in 1986 to resist the opening of a McDonald's (fast food restaurant) near the Spanish Steps in Rome.
Even before then, Hutchins had toyed with the idea of slow exercise before, only to lose interest. But low weight combined with slow movements seemed like the perfect program for these women: Following it, the women made dramatic gains in strength.