Courses related to software testing education, at the university level, in most cases have a learning outcome requiring from students to understand and apply a set of test design techniques upon completing the course. The problem, however, remains on how to both effectively and efficiently evaluate if a student has accomplished the stated outcome. By purely looking at the final resulting set of the test cases provided by a student, it is not evident which, if any, test design technique was used to derive them. In this paper, we are presenting a rather simple but effective method of collecting video assignment submissions from students instead of a traditional source code and tests solution. This way, the teacher could rather quickly and in detail gather evidence that student indeed obtained the knowledge needed for passing the stated learning outcome.