I an not sure. EIS are limited in the SOC that is in play here, so it is not Hypersmooth / Rocksteady / Supersmooth levels im afraid. also i dont know how dialed in Gitup have the EIS.
Not sure if the new EIS algorithms will filter down the system to these older hardware, but i doubt if it do, even if this hardware have the calculating power to pull it off.
I am not aware if streaming while recording are a option, while i have a camera build on much the same hardware i am not sure if it can do that cuz it have no interest for me.