The present study examines the impact of implementing video captioning and subtitles on listening comprehension with special reference to the speaker's speed. A total of 64 undergraduate Saudi EFL learners were assigned into six groups: fast speaker with full captioning, fast speaker with subtitles, fast speaker with no captioning nor subtitles, slow speaker with full captioning, and slow speaker with subtitles, slow speaker with no captioning nor subtitles. Each group was instructed to watch a video in English under its assigned condition and then answered a listening test. Participants also answered a questionnaire to determine the impact of these conditions on their cognitive load. The results revealed that the group that viewed the video of slow speakers with a caption obtained the highest score on the listening comprehension test, followed by the group that viewed the video of fast speakers with a caption. The group that viewed no caption video of fast speakers obtained the lowest scores. The questionnaire analysis indicated that the students in the subtitle slow group reported using low mental effort, whereas the students in the caption fast group reported using very high mental effort followed by the students in the caption slow group who also reported using high mental effort.