This study aims to improve the critical attitude of students in class X Phase E at SMK Negeri 1 Hiliserangkai, Nias, by applying the Problem Based Learning (PBL) method assisted by learning videos. The PBL method, which places students at the center of learning by exposing them to real problems, is expected to overcome students' passivity and improve critical thinking skills, especially in responding to information from mass media. This study used a Classroom Action Research (PTK) design in two cycles, involving 15 Catholic students. Data were collected through tests, observations, and interviews. The results showed that the application of PBL was effective in improving students' critical attitude towards mass media. This study recommends the application of the PBL method in other schools and the need for teacher training to support effective implementation.