i waited ≈30 mins for a video to be faster, and the result was great…until I tried to save it/airdrop it to my computer/import it to imovie and none of the functions worked. without closing out of the app, it suddenly deleted my newly-converted video, and projects are not saved in the app. If you only want to see a video played faster, it works! if you want to keep the sped-up video, this app falls short.