Yes, you can protect videos with the MemberPress AWS Add-on. We also have customers who are using MemberPress in conjunction with Vimeo, Brightcove, Wistia, Viddler, and other such video hosting services.
Absolutely—MemberPress can protect any posts, pages, or custom post types. And the front-end pages it generates, such as the product registration, login, account, and pricing pages, are all theme neutral. Also, for advanced users, a high level of customization can be achieved using page templates and custom CSS.
MemberPress integrates with PayPal Standard, PayPal Express Checkout, Authorize.net (AIM & ARB), and Stripe. These gateways allow for a PCI-compliant and much more secure ability to charge credit cards. Each one also provides a mechanism for issuing automatic recurring payments.