Hello CGrant,
Sorry to hear that you are having issues. I will try and address the above as best as I can.
1) The link to a PPV product can be shared but cannot be viewed unless they are signed into an account that has made the purchase. Unfortunately, it is not currently possible to prevent password sharing. You may, however, use a plugin that limits active logins. I cannot recommend a specific plugin as there’s a few and each may fit a particular context best. Please feel free to comment on what has worked for you though.
2) Can you please explain in more details what you mean by the “video is unwatchable from the same screen”?
3) Where does the link from the receipt lead them to? Do you have a link that you can share that can demonstrate this?
Looking forward to your response and resolving this as soon as possible.