Why wont my video work in my zoom meetings ?

I've bought an Amazon fire HD10 tablet in order to do meetings via zoom. The company I work for like to use a virtual background for this, but it says my device isn't compatible ?  They say that admin has removed this from my zoom account but it's still the same problem.. Showing the same message. I've tried everything, resetting, allowing camera access, re-installing, updates etc etc . 

PLEASE can anyone help please !?  

Any help would really be appreciated.