VideoPad allows you to do this by selecting the clip that is in the sequence and opening up the sub menu that holds video effects (the small triangle icon on the video toolbar). This will open the “Enter New Clip Speed Percentage” window, where you may change the speed by putting in a new percentage. At 100% this will play at the normal speed, at 50% that will play half speed, and 200% will play double the speed. Once completed, click “Set” at the bottom of the GUI window to make the changes. To play the video backwards, you will need to click on the “Play clip in Reverse” button.