Is there a hotkey to reset/recenter the VR view?

Quote from KingOfIce :

you can map a key with "/vr reset_headset" or "/vr use_relative" command (depending the VR headseat you got)
(else the hotkey is F8 but you have to click...)

Could you also not do /press F8?

yes you can but you have an action to do after (1 click) and there's a VR window openned (inconvenient when driving).
Instant reset with the 2 commands I mentioned above.

F8 doesn't cut it as I'd have to click the reset button which isn't very easy to do while in a race..

I always wondered what the difference between reset and use relative is?

I don't know/see the difference (I think it was created for a specific headset)