Smokes and mirrors has been a trademark for most cinematic and commercial-looking video projects. In this video tutorial it's mostly mirrors that were used.
The guys from Epic Light Media published a detailed lesson in which they show us how to use the natural sunlight with the help of several cheap modifiers from the hardware store, to create a polished, fantastic, fake, and funny commercial. If you haven't dealt with natural light before, there are several aspects of it: it's free, but if you want to modify it, you might need some tools for supporting your modifiers. In this case, lots of light stands.
The other drawback is that your source of light (the sun) is not at the same position, but moves. This requires constant adjustment of your modifiers. Apart from that, the results can be quite satisfactory, because spending less than $100 on modifiers can give you a million-dollar look, assuming you already have grip support available. If you light the scene skillfully, it may be unrecognizable from an artificially-lit shot with powerful, heavy, and expensive light sources. I think the creators of this video did a really great job achieving that result. Watch the video carefully, because there are more golden nuggets that will help you advance in your filmmaking or photography.