Product Placement.

A lot of directors, of not only music video's but also of full feature length films use product placement. This is when a certain labelled product is subtly displayed/advertised in a clip. The maker/company that produce the product pay the film company to include their product in the film, causing subliminal advertisement, making the audience want to buy these products.

Examples of music videos that contain product placement are :

Both of these pictures are taken from the same music video, (Telephone by Lady Gaga and Beyonce) and are only a few examples of the many types of product placement in the video. Product placement also helps to fund peoples costumes and huge factors of the video, which then helps the director when it comes to making a high quality video with a low budget.