Many people have had multiple gmail accounts since 2004.

I have a gmail account used solely for google store and Android TV related verifications that's unlike other business, personal, registration, or spam email accounts.

The TV's in the house, smart wifi devices, and guest wifi accounts are on separate subnets, the NAS hosted media has limited read only keyhole access accounts for TV apps to use.

Whether it's SmartTube or any other app (iView, SBSOnline, Netflix, etc) it's wise to assume that anyone can be comprised by malware to sniff traffic for (say) bank account passwords, host bots for DDOS or mining, etc.