The purpose of this study was to determine the effect of instructional videos on science process skills (KPS). This type of research uses the Research and Development (R&D) research design and the ADDIE development model. This study uses one class as the experimental class. Methods of data collection using a pretest and posttest. Based on the results of the data obtained, the highest increase in students 'science process skills was in the fifth indicator, namely communicating with a percentage of 69%, this was in accordance with the results of the students' pretest and posttest obtained as well. Whereas for the lowest increase indicator, namely the third indicator grouped with a percentage of 17%. The overall average of learning videos can improve 27.3% of process skills. In conclusion,
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