I just got the same error....
Just got the same error...Two different computers. Works if I remove the videos.
The issue of publishing the project is fixed now.
To fix the issue, just update the Flash ActiveX to the version 18.104.22.168 and you will be able to publish again.
To update the Flash ActiveX go to this link from Internet Explorer : Adobe Flash Player Install for all versions
To recover the old projects which got corrupted you can go through this article and recover all your old projects : https://helpx.adobe.com/presenter/kb/projects-in-presenter-get-corrupted.html
Adobe Presenter Engineering Team