Your brother being in USA should not impact your H1. These kind of issues generally come up in B1 or F1 visas, that too not always. Infact you did the right thing by not hiding this information while filing DS160.
If the VO asks you about your brother just reply him honestly. Most probably he would ask where is he located and what’s his occupation.
My stamping is done successfully…I am going to onsite in the 2nd week of March…Got my passport…Really, thank you so much for your help to me and to others…Chak De