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.
The term slow moving vehicle is generally applied to equipment and vehicles such as farm equipment (including tractors), construction equipment, trucks towing trailers, or any such vehicles which cannot operate above a specified speed.