Online instructional videos are becoming increasingly common within education. This study adopts a quasi-experimental 2 × 2 crossover design (control and experimental groups) to evaluate the efficacy of instructional videos to teach practical rehabilitation skills. The students performed practical sessions in class and were formatively assessed by their lecturers. The results demonstrate that the group effect was moderate with an effect size of 0.68, CI [0.04, 1.31]; the magnitude-based inferences indicate the probabilities the video was beneficial or trivial or harmful were 93.9% or 5.4% or 0.6%. The results of the study demonstrate that the instructional videos had a small to moderate beneficial effect on all assessed criteria.