Video Player widget

Hello… just recently bought a theme that included the SiteOrigin Page builders and Widgets. I’m trying to use the video player widget. When I copy/past the URL from YouTube as an external website in the video widget and click “autoplay” and “OEmbed”, the video is posted on the website, however the autoplay does not begin at all. I saw a comment/post on the forum three months ago where someone asked the same questions and was given an iframe code. I did EXACTLY as what was posted in that comment and the autoplay still does not work and in fact the video does not appear at all using the iframe code. I had to revert back to just copy/pasting the YouTube URL to have the video at least show up on my site. I would however like to get it to autoplay. Can you please help me?