How do I share presentations between Mac and PC via email

I have a PowerPoint (2010) presentation that was created on a PC and want to share it via email with users who may be on Macs.

The catch is that it contains several "embedded" You Tube videos. The videos play on my PC, but not on my Mac (just a black screen). I understand this is because the presentation actually "links" to You Tube instead of "embedding" the videos, and the links don't survive when the presentation is opened in PowerPoint on the Mac.

I've updated the presentation in Powerpoint for Mac (2011) so it will play on both platforms by downloading the presentations from You Tube, converting them to MP4, and embedding the converted videos into the presentation. However, this results in a HUGE file sizes that can't be emailed (e.g., embedding ONE video bumped the file size from 2M to 17M). Plus, there may be copyright issues.

I've also imported the presentation into Keynote. There are a few formatting glitches, but the big problem is still the video. I get the following error message for each video during the import process: "Import Warning - The movie"/embed/xxxxxxxxxxxxxxxxxxx" couldn't be found.". Plus, I couldn't find any way of re-linking the videos in the Keynote version of the presentation.

I've also tried making a video of the presentation, but had problems with the "embedded" videos once again, and never got far enough to see if this would result in acceptable file sizes.

One other thing. The author does not want to put the presentation up on the web or some other shared facility for security/confidentiality reasons.

So, has anyone solved this problem?

Any help would be greatly appreciated.