Hello,
I don't think that a video would help, but maybe you can illustrate it with few images.
Regarding the ajax submission ; it's not something I would recommend since the submission is handle by the HikaShop checkout system so the full shipping content must be sent ; so it cause the block to refresh (with the spinner etc).
That is why there is a "send" button ; and if you click on "next", it will do the same kind of action (submit the content with the rest of the checkout).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.