This paper discusses the design and practice of ESD (Education for Sustainable Development) through an online video co-creation workshop for Japanese high school students. Our research group has designed a workshop program that co-creates short videos to promote the UN SDGs (Sustainable Development Goals). The workshop took place from July to December 2020 and involved 112 Japanese high school students. The workshop consists of four phases: Research, Planning, Making, and Reviewing. Through questionnaires and qualitative observational surveys, we analyzed whether participating students could learn the seven abilities and attitudes emphasized in ESD in each phase. As many learning environments shift to online due to COVID-19, this paper explores ESD workshops that can be realized even in online environments, contributing to ESD research.