Just lost a 25 minute video. Had it set to save to camera roll, and it always had before. Guess it didnt like the size of the file.
Also, try recording it while your phone is mounted on a bike. The video will be so shaky that it will not be usable. But not the usual shaky. Its warbly, I guess because of the way it tries to keep the scene level. It looks like some strange effect put on it to make it look trippy.
I will not be using this app anymore because it is not trustworthy.
KennyInFlorida about Horizon Camera, v3.8.5