I'm watching the History Channel right now, and Bank of America just put an ad out that looked indistinguishable from the History Channel segment that surrounded it -- beginning as a historical bit about how Bank of America supposedly bankrolled recreating our navy. Then they say, "And today, Bank of America continues this tradition today..." and talks about some community work they do.
Unless you're watching with eagle eyes, it will be difficult for you to realize that you've left the History Channel's programming and entered paid advertisement. It's absolutely scummy of the History Channel to allow such an ad to air without flagging the ad clearly as a paid advertisement.