Trailers and commercials are sort of like mini time capsules. They embed the hype, nostalgia, love, and other feelings towards franchises and products. At least for me they do. There's some commercials that are burned into my mind. Like that Super Smash Bros. 64 commercial with the costumed Nintendo characters brawling in the middle of a field.

I've made it almost a ritual to download these commercials to look back on in the future. I've embedded some of the videos. I remember watching the PS3 - Universe of Entertainment commercial endlessly while trying to make the decision if I wanted to buy a Playstation 3 or not.