Thanks Rattus. Actually, I have set the network default in the network settings at a high enough level to accept my videos. I have an archive of videos larger than 50MB already on the network. I did have the problem in the past and worked out that settings issue. I am attaching a screenshot showing one of this archive. This is why I am at a loss because when I previously had the issue of video upload size a message appeared saying “File exceeds limits” but now, as in the screenshots of my orginal message, I am seeing “Upload completed”.
I have considered the issue of this being a server issue at my end but my other sites which are stand alone on the same server are loading the video no problem. So this seems like something specific to the network. If you have any insight I would be very grateful.