I am doing some more digging on this.
If I use the default from VIDEO plugin and point to the default mp4 from your site. It works fine.
However if I try to "choose your video" NO MP4 files appear. Only png, jpeg.
So it is likely a joomla mime thing.
Can you point me to where I have to have spagebuilder "see" mp4. The files are there and I can link to them but page builder does not see them and also a direct to link to them say no resource found.
So I suspect it is a config item. Can you point me to where sppagebuilder has its media types defined.
Thank you in advance.