Its normal with most of the projects, you need some existing knowledge to completely understand them since they can be quite specific and i think eHealth is still quite easy to understand compared to some other ones.
They definitely need some really good videos which explains the whole concept. I guess for quite some people seeing the sheer volume of the white paper is discouraging and they don't bother to pay attention to the the project.
They are uploading from time to time videos on their YT channel but they are more about the basics, not the content of the whitepaper explained. I hope they will upload something more in detail in the near future. It would help potential investors understanding the project more in detail