Solution:
we are aware of the upcoming FSE capabilities that will start to get included in WordPress 5.8.
The whole idea behind FSE is that the layout of a site should be editable without the need to compose custom themes. However, there are some key differences between what FSE will provide and what Toolset provides.
As a starter, single posts templates in FSE behave pretty much as theme templates: one template to rule all posts of a given type. Toolset gives much more control on which template should be used for each post. In addition, Toolset provides Dynamic Sources, which ensure that blocks used in a template will produce the right content for every post using the template; the mechanism to load dynamic content in templates crated with FSE is not clear yet. Finally, archives created with Toolset offer total freedom for layout and content design, while the new Query block for FSE is still too narrow in capabilities and options.
The issue here is that the user's custom video fields are not displaying on the frontend with the embedded video player, rather they are just displaying the URL.
Solution:
In this Users case I saw that their video format was .MOV which is not one of the formats that the wordpress embedded player supports.
