Combine decks and the videos vanish, freeze, or stop playing? Why copy-paste, PowerPoint's Reuse Slides, and online mergers drop embedded media — and how to merge so every clip keeps playing in the finished file.
One person used PowerPoint, another Keynote, a third Google Slides — and it all has to become one presentation. How to combine mixed formats across Mac and PC without rebuilding slides by hand or homogenizing every design.
Free online mergers need a full copy of your slides on their servers — a real problem for NDA, client, or board material. Why that's a risk, and how to combine decks entirely on your own computer with no account and no upload.
A short walkthrough of your first merge, plus fixes for the things people ask about most: fonts that change, a clip that won't play, very large files, and reading .ppt or .key.