Well I have around a 5 second video. I go to Stretch it (Slow Motion) and it makes the clip to around 10 seconds which is fine but only 5 seconds of it play. So it gets cut out. Why is it doing this? No matter what setting faster or slower it only shows 5 seconds of the clip.
Well its because you didin't change the duration of the comp. Cheange the comp length in the comnp settings and youll be ok.
Comp or work area didn't get changed. You also may need to reset the outpoint of your video. A screenshot of the comp with the layers would tell us exactly what you are doing wrong. We would not be guessing.
Rick is right. A screenshot is worth a thousand words. In the future please provide answers to the questions listed here: "FAQ: What information should I provide when asking a question on this forum?"