IF I COULD RATE 0 STARS I WOULD – SpeedPro Slow speed video edit Review

I downloaded this app and bought the $2.99 full access pack, after I spent like an hour editing my video I went to watch it and it only showed a sliver of the video and the rest of the screen was black. I'm not sure why this happened. I didn't make any changes to make it like that. So yeah. I know it's only $2.99 but still. If I bought the full access pack I should get what I was hoping for. Rip off! I'm really disappointed with this app. If someone knows how to fix this issue please let me know!
Review by smash802 on SpeedPro Slow speed video edit.