Educational chatbots represent a promising technology for improving learning. Prior research studies revealed the benefits of using chatbots in educational settings, e.g., to enable students to engage with learning content. However, the technology is not widely used in teaching practice. In response to this gap between scientific findings and usage of the technology in practice, we aim to enable lecturers to create their own customized chatbots based on educational videos by developing a chatbot creation tool that can create tailored chatbots (semi-)automatically. Following a design science research approach, we iteratively designed a software prototype that can convert lecture recordings or similar learning videos into chatbots. The specialty of the prototype is that it is designed to make the chatbot technology accessible to lecturers by reducing technical barriers. With the help of the prototype, it is possible to adapt the chatbot to the lecturer’s teaching content without the need for a time-consuming, manual creation of a knowledge base. Our evaluation with experienced lecturers, instructional designers, and developers of educational technology indicate positive results. In this paper, we present the results of our development and evaluation process.