This project is situated within the field of cognitive psychology, specifically examining the credibility assessment of online videos by middle school students (from grades 6 to 9) . The study pursues two primary objectives. First, it aims to evaluate students' sourcing and information evaluation skills, when processing video content, specially AI-generated online videos. Second, we seek to identify the individual cognitive dispositions (attitude toward the climate change hypothesis, attitude toward AI, prior knowledge about climate change, epistemic curiosity, need for closure) that may influence this process and determine their effect on video evaluation. The stimuli focus on the topic of electric vehicles, a contemporary socio-scientific issue related to sustainable development that is highly susceptible to controversy and misinformation.