(ask) Cannot access ip public from internal network

hello, i want to ask, i have ip public 2.2.2.2 that mapped with virtual IP to internal network 192.168.10.5 to access CCTV,

if iam outside network and use mobile data with my phone i can access cctv with ip 2.2.2.2, but if i use my internal network and access cctv with my public ip 2.2.2.2 cannot access cctv, how to solve that problem? sory for my bad english.