Autoplay function for Youtube videos not working

Autoplay function for Youtube videos not working

Hi all,

I'm trying to autoplay an embedded YT video on a zohosite but it won't work

Let's say the embed code for the video is this 
  1. <iframe width="560" height="315" src="https://www.youtube.com/embed/8S-ddHMVtSE" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
I tried to add just after the video ID "&autoplay=1" , " &autoplay=1", " autoplay=1"

None worked