CSS Dataset - Videoplayer with differetn Posters on different dynamic pages

How can I add a Poster(cover) to the Videoplayer, if I’m using CSS dynamic pages?

I have designed a page layout for multiple projects. I’m using a Dataset to display a video an different pictures on that site.

I would like to have a cover, before the video will be played by the user.
I would like to add different covers to the different dynamic pages.

So I think I need to change the “design” of the video player by putting something in the code, which tells my dynamic page to change the design of the videoplayer so there’s always a cover.
The cover I would add to the Dataset to have different covers for different videos on different dynamic pages.

I think I will need to add this in the code.

As I’m not familiar with coding could someone maybe help me here?

Or is this even possible?

Having some sort of preloader/splash screen should be possible. If you need help with this then try either the Collaboration section of the forum or https://www.wix.com/marketplace for paid support.