I can't help but confirm the last two with this, because it's funny.
My Mom spent $97 on a "HD antenna" that took me over an hour to put together (instructions were horrible), and could never get but 1 channel. She returned it. I bought a Dell laptop with a built in TV tuner and it came with this really small rabbit ear type antenna, that I thought was quite funny. We hooked up the rabbit ears, and I started the TV app, and even in my basement, I could get quite a few HD channels. Mom came to my basement because she didn't believe it.