A typical course to improve your video skills and make a short video about your work or research, would consist of two sessions, three hours each. The first workshop will focus on choosing a format, composition, camera (mostly a smartphone) and sound. Then the second one, a few days later, will cover editing of the footage shot in the meantime. Also half day workshops or more elaborate courses on documentary making are possible.
For the science and international part, I mainly work together with naturalscience.careers. They offer over 30 different workshops and talks for scientists. Mainly in the soft skills topics. In other words, all the wonderful things you don´t learn in the lab but make you more effective and employable. You can book me for video trainings on their website or have a look at what else they have to offer.