My perfect Figma Slides Presentation is no longer working!

We created an important 5 year vision presentation via Figma Slides about 1 year ago and it worked beautifully. Now it’s not. There are embedded Figma prototypes on each slide that have videos within them that are now all playing at once. If you go to the original embedded link outside of slides the prototype works fine. What the heck changed?!  Please HELP this was a ton of important work!!