Surfboard mount on the front of board: use the sticky pad (ive never had issues) or the fcs plug. good for getting the rider in view but cant see much else.
kiteline mount:
video is very shaky but photos can be good. This would be really good with the new wifi backpack option to take photos by the click of a button.
depending on the centre lines set up, the more yuo get in view. (i used cabrinha, the centre lines split off about 5m up i think)
or the helmet mount (teletubby) works good for getting all of it in from a riders perspective.