IMO the best shots show at least part of the bike. Head mounts are ok but head nodding gets annoying after a while. How about one each side on the crash bars then edit the films for left and right views.
I use front beak with sticky mount, side panel with sticky mount which can be used facing front or rear, helmet mount (best for solving vibration probs), and one on side pannier top for front/rear views. One camera swapped around.
Mounted direct to the bike will always mean you have to accept vibration. More so if you use articulated joints and arms. This is only usually bad at times of acceleration or bumps and with judicious editing you can find plenty of smooth footage to use to knock up a vid.
I agree with the comment that having a bit of the bike in the shot is a good thing - gives the viewer a point of reference. It is always better to have another rider in shot if poss so the viewer can experience the lean along with a view of what it looks like.