The education system in Malaysia, as in many countries, is leading towards the 21st-century teaching and learning which integrates the use of electronic media such as video. Integrating video material into the practice is one of the strategies to improve vocabulary in language learners. To achieve this, teachers have to maximise the use of video for self-paced learning despite the students’ skill levels. However, research shows that only a small percentage of teachers use video regularly. Thus, this research aims to explore the effect of captioned television series on vocabulary learning in Malaysian with a predominantly Malay rural school context. This quasi-experimental study involved 61 students from SMK Sultan Tajul Ariffin to quantitatively explore the vocabulary input level after watching captioned TV Series. The study indicates a significant improvement in vocabulary after the treatment. Captioned video benefits students by improving their vocabulary compare to the non-captioned. The captioned video provides authentic language that scaffolds language learning using simultaneous listening and reading. This study is hoped to provide teachers and students with the insight to the potential of captioned video in improving vocabulary, especially in ESL teaching and learning.