Fix WordPress Video Montage Slider

My WordPress site has a video montage on the landing page that has suddenly stopped playing, even though no recent edits, updates or new plugins were added. I haven’t tried any troubleshooting yet, so the install is untouched and ready for you to investigate.

I need someone who can jump in, identify the root cause—whether it’s a JavaScript conflict, a disabled slider layer, a caching issue or something else—and restore smooth playback on desktop and mobile. Please work directly in the existing theme/plugins; I’m not looking to rebuild or swap tools, just to get the montage working again.

Deliverable:
• The montage loads and plays seamlessly on all major browsers and devices, exactly as it did before.

Let me know your estimated turnaround and any access details you’ll need.