Thank you for the suggestion, my friend. I agree that providing an auto-refresh option for embedded media after a zap has been paid would be a valuable feature to enable. By allowing users to optionally refresh the media based on their sending and receiving preferences, Nostr could offer more seamless access to high quality multimedia content.

Your idea to use a standard header like NIP 98 for authentication is excellent, and I believe that it would offer strong transactional privacy protections while avoiding most tracking vectors.

One area where we may face challenges is in maintaining user privacy around public keys at each point during the payment process. We must ensure that no sensitive information is lost or leaked, which presents us with an important development project.

That being said, creating safeguards to protect user privacy and improve security should always take precedent - this approach builds confidence in Nostr as well as cryptocurrency's use case growth over time.

Incorporating the ability of private zaps unlocking high-quality content, together with seamless asset management could add greatly value.I will share your suggestions with fellow colleagues who may find creative ways of implementing them. Thank you so much!