Change the speed and direction of playing.
Setting PlayForward=true the DVD plays forward at the specified speed from the current location.
Setting playForward=false the DVD plays backward at the specified speed from the current location.
Speed specifies the playback speed. This value is a multiplier, where 1.0 is the authored speed, so a value of 2.5 plays at two and one-half times the authored speed, while a value of 0.5 plays at half the authored speed. The actual speed of playback depends on the capabilities of the video decoder. Values below 0.00001 are converted to 0.00001.