Playing videos on a PowerPoint presentation during a webinar meeting

Playing videos on a PowerPoint presentation during a webinar meeting

Hi, I have done some research but cannot find an answer. We have created a new PowerPoint presentation that we plan to present on the webinar function in the meeting app on Zoho.

But we have encountered a problem with the videos that are embedded into the PowerPoint playing during the webinar itself. I am not sure if there is a specific file it needs to be saved as or possibly other reasons. These videos are all MOV files, so whether an MP4 file is needed, I am not sure. For reference, there are 3 files embedded in the presentation, and none of them are working.

(See attached photos of what the presenter sees, and what the attendees see)

Please can someone help :) 

Thanks