Thanks for responding. Yes a good portion of the videos show up in the media library, then they go gray and then disappear.
These are the plugins I have installed.
WP-PageNavi
Responsive Lightbox
Regenerate Thumbnails
Hello Dolly
Default to GD
Contact Form 7
Akismet
It doesn’t seem to be a timeout issue, especially since the files appear to be successful. I feel your take of “something messing with the files” is accurate. It is almost like some action runs at the moment of upload and decides randomly what to grey out a minute later. It is very odd.
