[mythtv-users] Mapping OTA channels to HDHomerun tuners

[Raymond Wagner]

I think the misunderstanding here is what a "video source" actually is. 
A video source is a list of channels. Every tuner tied to that video 
source must be able to access every channel defined in that video 
source. You will want to set up two video sources, one for Toronto 
channels and one for Buffalo channels, and tie your four tuners to which 
ever of those two sources is appropriate.