From Presto:

“I don’t think you’d want to call the media hub. The Media Hub is media + player settings. This includes chapters, poster image, performance settings, controls, overlays, etc. I’m assuming your users won’t have access to this interface.

Instead, you’ll likely want to use the regular media library, and output it in the player like this:
<?php

do_shortcode(‘[presto_player src=”yourvideo.mp4″ preset=1]’);

Note that I just added the video url right there – no need to select from a media hub, just provide the url. I’ve also added a preset that you can use for all users if you want.”

Does that help?

They sent a reply about using short codes to link the videos. This does not get us to where we need to be. I await a better reply.

Currently, Presto invokes “Video Add” from the block editor or other editor. Is there a way to call a block editor function as a field or the same function they call? It needs to allow you to select or upload a video and then place it as the post.