This document summarizes research comparing the effectiveness of HTML versus streaming video tutorials for online library instruction. It finds that students learn more from video tutorials, as measured by confidence levels and quiz scores, because video tutorials use both visual and verbal modalities supported by dual coding theory and have a more linear navigation structure supported by constructivism. The researchers surveyed and tested students after viewing tutorials on Value Line Online, with video tutorial students reporting greater confidence gains and scoring higher on all quiz questions. The document concludes that while online tutorials can supplement live instruction, video tutorials are more effective for student learning.