Customizable Privacy for Spaces Items.

I have a problem about privacy of Spaces items. If we restrict privacy, only I will see these items. If we don’t restrict it, everyone will be able to see the items.

Here is an example scenario and what I want:

I don’t want everyone to have access to the items. Items are special training videos. If the access request comes from my website then my website should be able to access these items. How can I do that?

In other words, when I share the item links in an area on my website, users should be able to watch these videos.

And the question of expertise: 1- If the request to access Space items comes from my website, then they must be images. 2- But I still want to prevent videos from downloading. What solution should I come up with for this problem?

Thank you very much for the answers.