Embedded Videos Not Playing

Hello,

We have a PowerPoint slide deck that includes a couple of embedded videos.  They play just fine when viewing the slideshows locally, but when we try to present the slideshows via Blizz the videos will not play.  An error message comes up that says they're not available when we try to hit play.

Does anyone know why being in Blizz would disable the playback of videos embedded in a PowerPoint presentation?

Thank you,

Lindsay Campbell