This book investigates the effects of English-subtitled YouTube videos on incidental vocabulary learning among EFL students and their attitudes towards them. The researcher indicated that the experimental group, who learned English vocabulary via English-subtitled YouTube videos, scored better on both the immediate and delayed posttests than the control group, who learned the same vocabularies via word flashcards. The questionnaire's results showed positive attitudes among the experimental group towards integrating English-subtitled YouTube videos in EFL vocabulary learning because they recalled about 30 out of 50 words in responding to the questionnaire's open-ended question. As a result, the researcher recommended the inclusion of English-subtitled YouTube videos in English curricula for effective vocabulary recall. She suggested that EFL teachers should receive professional training on how to use English-subtitled YouTube videos in teaching English language vocabulary for EFL learners.