Hit indicators are very Work In Progress in the footage you saw, they're going to change for the Open Beta and will change again even more at launch since those are the elements we save time for iterating on usually at the end. Same applies to kill-feed and the similar hit / kill feedback elements.
The issue with hitmarkers showing below reticle / crosshair was a bug as well which has been addressed since.
Options to customize crosshair / hit indicators / kill indicators will be available and we can potentially add more heavily requested options! :)