I don't watch much TV and when I do it is usually filtered by TIVO or some other service that lets me be very picky about what I spend time seeing. True, I miss one or two cute commercials that way from time to time, but guess what? All of the really adorable commercials, such as the little dog who sings about having no bugs on him, for example, can be viewed online anyway.
For that matter, there are also some TV shows I've seen online. I used to have a tuner card in my home computer many years ago, and then when we got the Media version of Windows, it came with an external tuner, and on those rare occasions when there were two good "somethings" on at once, hubby could record his on TIVO and I could record mine on my laptop. But now I'm running wireless and don't want the baggage, so I've been looking around for a legal way to pull some shows in over my laptop without having to have any extra equipment.
The above link is sort of the mother of all free online TV resources. It has way more information about what is available than anyone could possible use and to help you wade through it they have several training videos on how to navigate over there and also many genre pages. Before I headed on over to gardening (that would be the Home & Garden Online TV page), I noticed that there was a section on 4th of July fireworks displays. So I got distracted by a few webcams links they had posted there. Not TV, but apropos. The real ones haven't started yet where I live, but we live near a resort casino that puts on a display every year and it is about time. We should be able to see a few through the window any minute now.