That sounds weird, and it can be a bit choppy, but it has advantages. You get to stop and think at the points where others needed to ask questions. You have natural breaking points if you prefer smaller-sized bites.
So, I don't know if the students are in all of your video, or just when they ask questions. But if it's only when they ask questions, you might consider this approach.
- Typo - "principle goals" / "principle techniques" instead of "principal"
- Add accessibility and internationalization under non-functional testing types, with at least a brief mention of their importance
- Add mention of exploratory testing under manual testing as a valuable technique
- Most of your students will not be QA staff themselves in their careers, so a brief mention of the benefits and pitfalls of collaborating with dedicated QA personnel may be useful. A mention that the type of QA personnel varies highly by software subspecialty and size of the business (ranging from non-technical to CS degree holding specialists) may also be useful.