本研究主要目的為探討越南大學生運用網路影片自學英文單字，對其自學字彙效率之影響 ; 此外，亦探討學生針對網路影片教材的自律學習態度。研究問題如下：（一）網路影片是否能增進越南學生自學英文字彙之效率？（二）學生對於網路影片自律學習教材之態度為何？在本研究中，共有45名來自不同大學的越南大學生被分成兩組。本研究同時採用量化研究及質性研究。量化資料來自於學生的前測及後測資料。質性資料則來自針對學生自律能力及字彙學習的半結構式訪談。研究受訪者共十位，包含五個能力較高的學生跟五個能力較低的學生。研究結果顯示學生在文字記憶上有進步，這代表著他們可以在實驗結束後回想起所學之英文單字。學生大致上對於影片的回覆都是正面的，他們願意在自學過程中採取額外的步驟來觀看影片。大多受訪者認為網路影片對他們來說是有用的，並表達有意願繼續使用影片教材在他們未來的學習上。本研究指出在越南學校系統中，大量的語境使用及對於英語的需求，促成數位影片學習教材在字彙學習上有著更好的效果。最後，本研究針對教師與學生指出網路影片如何影響學生英文字彙自學過程。

The aim of this thesis is to examine whether by implementing English web-based videos, students would be more capable of self-learning vocabulary effectively. Yet, this study is also designed to investigate students’ attitude toward the use of video material in term of self-regulating. The generated research questions include: (1) Does the web-based video facilitate Vietnamese students’ EFL vocabulary self-study? (2) What are the overall attitudes of the students towards the web-based videos in terms of self-regulated learning? In the current study, 45 Vietnamese undergraduates from different universities were recruited and divided into two groups. Data were collected using both quantitatively and qualitatively. The quantitative data were collected from students’ pre-test and post-test. For qualitative data, the researcher administered semi-structured interviews to elicit the EFL students' attitudes towards the use of video in term of vocabulary learning and self-regulated ability. Ten participants from the experimental group were chosen based on their performance during the experiment, including: five high achievers and five low achievers. Moreover, participants were asked to write self-study records for triangulation. The findings revealed that students improved their word retention, which means they could recall more vocabulary after the experiment. Furthermore, students' overall response to the videos was positive. While watching the videos, participants were willing to take on additional steps in their self-study process. Furthermore, the current study found that participants are likely to continue using video material in the future. The majority of interviewees agreed that web-based videos were useful and expressed an interest in incorporating video material into their future learning. The research proposes that there is some justification to the belief that digital material such as web-based videos may elicit more consistent results overall than some of the more traditional method for EFL vocabulary learning. This phenomenon may result from the great variety of linguistic environments and the need for exposure to native English in the Vietnamese school system. This research informs learners and teachers about how web-based video implementations affect English vocabulary self-study process.

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