I can’t speak to those channels specifically as I’m not really sure. Typically though if you use PlayOn, as long as the channel is available in the software or as a plugin you’ll be able to watch shows from that network. Not all networks make online streaming available, however, so it really depends. There is a link in the article above to the PlayOn site mentioning which channels are available.
There is NO WAY to get FREE CABLE TV over the air, with an HDTV antenna. It is not possible to get HGTV, The History Channel, AMC, CMT, TVLand, and those other types of channels over an HDTV antenna! I wish these websites and these phony ads would stop fooling people into buying these “magic sticks” and “magic TV” antennas claiming that they will be able to watch CNN, TNT, TBS, The Science Channel, Biography, National Geographic, etc. without paying a cable company. It is NOT TRUE. They can stream whatever with a subscription, but guess what? THEY STILL NEED TO PAY THE CABLE COMPANY FOR INTERNET ACCESS AND THAT COSTS ABOUT $80 A MONTH WHEN YOU CANCEL THE BUNDLES!