Hello, devs.

I'm Ren from Digimon Masters Online.

We've recently released an announcement of our Christmas events and promotions. Since the event title is 'You Better Not Cry' (lyrics from Santa Claus is Coming to Town), we thought it would be nice to set a background music.

Is there any way to make a YouTube video link autoplay without having to manually access the link?

I've tried all these 4:

<iframe width="560" height="315"
src="https://www.youtube.com/embed/iTUez3vB76A?amp;autoplay=1"
frameborder="0" allowfullscreen></iframe>

<iframe width="611" height="370" src="https://www.youtube.com/watch?v=HWv72L4wgCc?amp;autoplay=1" frameborder="0" allowfullscreen></iframe>

<iframe width="560" height="315" src="https://www.youtube.com/embed/HWv72L4wgCc?amp;autoplay=1" frameborder="0" allowfullscreen></iframe>

https://www.youtube.com/embed/HWv72L4wgCc?amp;autoplay=1

The third one actually worked on our system when we tested it, but not on Steam. It led to this autoplay link: http://ilovecase.co.kr/steam_test.html

Any support regarding this would be greatly appreciated <3

Thanks :3