Vocabulary is the flesh of a language, which is an indispensable constituent for a language. This research highlights the role of language learners' acquisition in incidental and intentional vocabulary by using technological modality. Effective usage of vocabulary in communication and comprehension is crucial and demanding as well. English being the diplomatic language, and which is witnessed as a parameter for graduates, particularly in job acquisition. There are numerous teaching methods were followed for effective learning. In order to benefit, English as a second language (ESL) learners and English as a foreign language (EFL) learners, task-based learning (TBL) approach is observed to be an effective learning method. This paper devices to use technology, entertainment, and design (TED) talk video with subtitles in the syllabus of TBL learning for effective learning of incidental and intentional vocabulary in language and succeeded by analysing the response from the students. The study reveals the significant development and interest in learning a new word by using the authentic instructional TED talk videos for vocabulary learning and vocabulary acquisition. Copyright © 2020 Inderscience Enterprises Ltd.