A: hey there - here are some quick answers but I would suggest you watch the demo for a very thorough tour.
1. Does the app have any CTA features that would send my subscriber to a 3rd party link/website for support/knowledge base? -- Yes, you can add a link to the subscriber nav, you can add links to videos and playlists, and you can add to the FAQs.
2. Any way to forward a current subscriber to another of my channels? ( not to share videos but for them to maybe become a new subscriber? -- Not specifically, but I imagine you could accomplish this through email marketing
3. Authorization to view/use the app is based on Cell phone number or registered Email/Password ? -- No - check out this article: http://help.odeum.io/en/articles/4502426-magic-link-activation
3a. If email/pwd is the login authorization .... Are Multiple concurrent logins from the same email/pwd allowed? - Multiple devices can access the same account, yes.
4. If I offer a 14 day trial that ends ... the 25th of each month and they do not subscribe ... .. does the registration/code, automatically removed /expired by your system, so I am not charged the $1 subscription fee? -- Here is another article: http://help.odeum.io/en/articles/4564811-per-subscriber-fees-in-odeum

Hope this helped!