You cannot control the video except for the pause and resume. They are prerecorded videos, but it's still cool and when you go up, so is the threadmill, down the is the same. The application control the machine inclination to match the video. My machine can go 15% up and -3% down, so you kind of feel that you are there and following the terrain. I have a Proform 9000 but this app work with any Ifit compatible threadmill. it's expensive, at 250$ per year membership but I got it for free one year with my machine and will continue the membership because I find it motivating.