I went ahead & set the variables as you recommended with no change in the outcome. I have also sent an email to my server tech & I'm awaiting an answer.
I would assume this is all a php problem? Obviously I can upload, with no problem, files that are many times this size via ftp to my server. In fact I uploaded the video file in question via ftp, but I can't see any feature that allows you to add a file from a web server to the PhotoPost program.
If my server tech replies with no problem on our end, do you have any other ideas what may be causing this? Could it be a possible problem with the install? I paid to have one of your techs install PhotPost 2 days ago.