just a little update in order to close this ticket… :D
…I’ve just moved the website from the staging to public and the autoplay works!

Thanks for all your help, and patience! :D

Best regards
Valeria

🤦🏻‍♀️ really sorry, I got confused with all the modifications I tried. You are right there is only the video element actually… but when I go to page preview I always have to click to play

Great! thank you

Thank you! It works perfectly!