If you trying to play the content locally it may not work,In that case please try to host your content in any web server. Youtube should work both in swf and html.If you are still facing any issue let me know.
Presenter Engineering Team
I'd like to chime in because I have the same problem. So if I publish my Presenter 11 project as a swf file, I can then upload it to YouTube?
I believe the YouTube link is to embed a YouTube video into your course, not to upload it to YouTube.