The video discusses a Kustom Interior seat cover of 15-Up Ford Mustang, aiming to convert it into a more premium version. The modification involves installing seat covers from Kustom Interior to achieve a leather-like, premium feel. The video showcases the installation process, highlighting that the seat covers fit tightly and offer a comfortable and premium look. The seat covers are considered a cost-effective way to upgrade a base model Mustang to a premium one without the expense of factory leather seats. The video emphasizes the ease of installation and the positive impact on the interior's aesthetics and comfort, with a particular focus on the red seat covers used in the demonstration.