In reply to olddirtydoggy:
> Would a handlebar mount vibrate and jump too much?
In my experience a handlebar mount is more stable than a helmet mount (almost anything is, in my opinion, unless the wearer is skilled at using their head as a tripod - most aren't) but it does tend to have an almost continuous side to side wobble simply because you're almost always making tiny adjustments to the steering to stay upright.
I use a chest harness like this one from Decathlon:
https://www.decathlon.co.uk/co-nect-chest-harness-id_8385663.html
It's the most stable I've yet found for activities like cycling and skiing, although it's fairly rubbish for walking - you don't realise how much you go up and down as you walk until you watch footage shot using a rig like that.
In reply to Dax H:
> From my experience ignore the go pro knockoff mounts on ebay. I found the plastic was quite brittle and breaks easy.
Some do seem to be fairly rubbish. Trouble is, it's difficult to know which are the OK ones and which are the poor ones.