If u were getting OTT /Xstream subscription bcoz of DTH connection then it might be blocked if latter is suspended. I think if XStream subscription is linked with mobile or broadband account then it will continue. Even in Tata Sky VoD services were inaccessible if DTH account remained suspended. Basically u need to have some airtel connection active to use box.
Check once again if only XStream app is blocked or YouTube is also not working?
Check once again if only XStream app is blocked or YouTube is also not working?