Video-mediated instruction is an instructional methodology that effectively imparts practical skills through video. Instructional videos are increasingly being integrated into educators' pedagogical practices in every field. This study aims to investigate the use of videos for vocabulary learning in Pesantren and focuses on how teachers implement vocabulary learning using videos and their impact on teaching practices and student learning outcomes. This research employed qualitative methods with a case study approach. Observations and interviews were the primary source of the data. The participants were selected purposively: Two English teachers who had taught English in Islamic boarding school for over six months and had specific learning media and ten students should score high in their English lessons. This research found several techniques used by teachers to teach vocabulary: video, role play, card and removed some vocabulary from a song lyric, then played the song again and asked the students to find the missing vocabulary and several types used by teacher to teach vocabulary: animation, cartoon, movie and song. The used of video is very helpful for vocabulary learning. By using video they feel can remember and understand vocabulary faster. In conclusion, the use of videos are very effective to support students to remember and understand vocabulary quickly, and to make it a very useful media in vocabulary learning.