Apologies if this isn't the right part of Stack Exchange, this seems the right place though.
I'm helping a music teacher friend who lives on private tuition. They want to provide short videos that students can learn with between face-toface lessons but doesn't want those videos getting passed on in the wider world. They aren't looking for a get-rich-quick scheme, the teacher wants to teach one-to-one students.
We've looked at You Tube and Vimeo so far. In the student context I understand this means:
Vimeo simply uses password access. i.e. if one student passes on the password then there is no protection.
You tube has a feature that requires a student to log in with their own gmail account which has been pre-authorised by the teacher. This seems ideal except that it seems not to work. The user interface accepts one e-mail address and then refuses to add or delete any users.
Question: Are there any other online tools that provide protection to teachers distributing course materials?
Context #1 I don't think they are that bothered about people thousands of miles away getting the benefit. Its more just where it might make the difference between a recommendation from a current student to a potential new one (i.e. very positive) instead becoming "here, use all these videos for free" (i.e. a direct loss of income).
Context #2 Clearly we realise there is no protection from someone using you-tube downloader or something like that other than putting the teachers emblem in the corner of the video.