I see the (((pay TV))) disinfo ad campaigns worked well. You fell for it.
OTA broadcast TV still exists. They are sill in the normal broadcast VHF-lo, VHF-HI, and UHF channels. Just the upper part of UHF has been sold off to cell phone companies.
The FCC or anyone else won't notice or care about your flea powered pir8 TV station. You are nothing to a 1000kw ERP TV station pumping out ATSC1. No one will ever find you on their TV's because of the way modern TV's work. You have to go through a menu system and manually scan to find new stations and modern set's don't even have NTSC tuners anymore. It is not like the old mechanical tuner days where you had to tune past a bunch of empty channels to get to the next live one. Back then a new TV station would be discovered quick.
To get NTSC to cover a few blocks your going to need decent power. The FCC will find out about you when your rube goldberg amplifier starts dumping 6mhz wide harmonics all over public safety or ham bands. That is how most FM radio pirates end up getting busted.Not for their actual inband broadcast but because a harmonic drops in a very bad spot. They don't know how to filter their output and they don't have the equipment to check it.