tonyride
Don't piss off the red guy
Without a gimbal stabilizer the helmet is the best place to mount a camera for smooth videos because your head is naturally a stabilizer. I have a chest mounted gimbal and although it works well and keeps the video smooth, it can get in the way sometimes when you have to shift your body around a lot. I'm constantly bumping it when I'm doing technical runs down the trails at Mountain Creek but OK on XC rides. I put the smaller Session on the helmet and it's almost just as smooth. If you have a full face helmet you have multiple mounting options (top of helmet, side of helmet, under the visor, under the chin). Each location has its own advantages.