In this study, we aim to analyze the effects of discovery-based learning through film viewing on students' knowledge about a specific animal species and its habitat. The following hypothesis is tested: students' knowledge about animals and their environment is greater as a result of discovering information through watching videos. The study involved 20 fourth-grade students. In the first phase, a pre-test with 20 items was administered to assess initial knowledge about the topic. In the next phase, students watched videos at home about the studied subject. In the final phase, a post-test similar to the pretest was conducted at school, and students discussed with the teacher other information they discovered through watching the films. The results confirm that discovery-based learning, facilitated by film viewing, is an effective strategy for stimulating students' interest and facilitating the acquisition of new knowledge.