Any kiosk software that can auto play a video with audio?

I’m struggling with a job for a client. They want to demo an interactive web page, but want to show a video upfront so when you click the screen it jumps to the demo. Then after 1 minute of not being used, it jumps back to the video and auto plays it with audio again. They don’t have access to the demo so that page is locked, can’t be changed and can’t be embedded in an iframe.

Previously, the video was mute, so I was using a programme called KioskSimple that allows me to inject a button into the demo website to return to the video page. I know I can launch Chrome with chrome.exe --autoplay-policy=no-user-gesture-required, but the problem with this is when I go to the demo website, I can’t get back.

The demo is interactive as well as it uses the camera to record a clip and feed it into an AI so there is no way that can be recreated.

Any suggestions will be greatly appreciated.