If someone could make money out of your videos they would be away with them. If there was some benefit to them they would put them on YouTube. There isn't, so it doesn't matter and you have made things better for your students as a result. You might want to think if putting them on YouTube yourself would do any harm.
If the *only* thing you have to offer is some videos (I don't mean you - I mean in general) and no other benefits from the Moodle course then you might as well save yourself some bother and stick them in the post of DVDs.
My concern is that, as an administrator, it is a requirement to make videos (or other materials or even quiz questions) secure. When you don't, because you can't, saying you could becomes a career-limiting decision.