yo man just helped someone with this
slow a clip down right click on the clip and press PROPERTIES at the bottom of the drop down menu
then once the properties menu pops up there should be a box listed as PLAYBACK RATE with numbers that are 1.000 that is the speed the video was taken at to slow it down change those numbers to anything lower like 0.500 or 0.750 then drag your clip out and it should be slow mo