While you can watch local TV online, the best way is with an OTA antenna.Connecting one antenna to multiple TVs can sometimes be an ordeal depending on the signal strength in your area.
If they are positioned in multiple directions, you may want to use an omni-directional antenna like the Mohu Sky.
I found the Sky to be the best small multi-directional antenna I tried, and personally use it myself.
Therefore, it’s wise to get a splitter where the number of outputs exactly matches the number of TVs you are hooking up.
For more information check out my post on choosing the right coaxial splitter. In other words, if you are hooking up 3 TVs use a 3-way splitter instead of connecting the output of one 2-way splitter to another 2 way splitter.
A 3-way splitter provides 33% of the signal strength to each TV.
However daisy chaining 2 splitters will provide 50% of the signal to the TV connected to the first splitter in the chain, while the 2 TVs connected to the second splitter only receive 25% of the signal strength.
I’ve seen situations where all the TV’s work fine with their own indoor antenna, but once the outdoor antenna is installed, no TV can get reception.
These issues mainly result from improper installation of the coaxial cable and antenna cable splitters running from the antenna to the TV’s within the house.
It took me years to learn this, but taking the time to install something properly will save time fixing mistakes in the future.