How to make autoplay video on 3rd sites?

Example: Can I add &autoplay=true param to the embed link? How to do this?

https://xtv.vn/?attachment_id=3346&kgvid_video_embed%5Benable%5D=true&autoplay=true

You’d have to customize the javascript on your 3rd-party sites to start playing the video when a user closes an ad. There’s no way for a video inside an iframe to know that a user has closed an ad on the container site. That’s basic browser security.