Video in Powerpoint

I prepare my sermons in Keynote then export them to powerpoint before uploading them (as I have to). But videos just turn into still images. Can this be fixed, otherwise I have to split the presentation and put videos into the cue in between.

PowerPoint presentations are converted to still images for display.  You have the option to display presentations with videos on Windows by launching the presentation with PowerPoint, but on MacOS still images are the only option.