This study values the broad range of web videos produced by businesses to introduce new technologies while also promoting their products. When the promoted technology is related to the topic taught in a school course, it may be beneficial for students to watch such videos. However, most students view the web as a source for entertainment, and may have negative attitudes toward adopting these web videos in the classroom. This study examines how students' attitudes toward a technology vary as the commercial web video is used to deliver the subject content. A quantitative survey is conducted in the dimension of interest, confidence, and value. The preliminary findings reveal that the commercial web videos did provide positive learning effects upon these three dimensions of learning attitude. The results suggest a plausible way of leveraging commercial web videos in school teaching. Further discussions provide some insights in using commercial web videos in teaching.