Securing access to videos

Hello Team...

This is out of a pre-sales question.  I have a client that's interested in the SS platform but has a few requirements.  They are interested in selling some online courses through their site.  They will be uploading videos and want to know if there are means to do any of the following

a. password protect the videos

b. create access to the videos that expires after 1 month

c.  keeps viewers from downloading their videos

Please feel free to offer recommendations or possible solutions where you may have encountered this situation before. 

Respectfully

David