How can I develop a slide presentation that is editable online and plays and pauses similar to a video

I am looking to create a slide presentation that is editable online from any desktop web browser. I want to be able to add and remove text and other visual components as opposed to a video where everything is wrapped up together and has to be remastered and republished each time that a change is made.

Recently, we have been trying to do this in a lightbox such as the one that is visible as of this writing on this wix.com page https://tptxdev.com/carlist.

This lightbox here needs to contain a slide presentation that I can edit. I should re-iterate that A video will not work here because I need to be able to retain the ability to edit text and visual content from within the Wix editor.

The reason for the lightbox over other types of interactive boxes is that a lightbox has other features that are not available in other types of boxes, such as the ability to add a close button like the X that you see in the one that is showing. This X button makes it very obvious that there is a way to close it and that is a critical piece, as are other features that are unique to this type of interactive box.

If we can't do what we want only with respect to the presentation at wix.com then we may have to find other ways to do it and then embed the content unfortunately. 

One thought was to use Google Slides but I don't know if it's closeable or if it will be possible to make it start automatically but in silent mode. 

We have settled on Wix as our platform of choice for countless reasons in addition to the fact that Wix is truly a full stack development platform with the ability to load multiple code libraries from outside sources and even connect directly to our external database when the time comes. The language is similar to Javascript and is called Velo, although we have not yet used the search term "Velo by Wix examples" or tried to custom code anything quite yet.

Suggestions on the best way to handle the PRESENTATION PEICE are greatly appreciated.