Board Thread:Support Requests - Designing Your Wikia/@comment-24814805-20150514085235/@comment--20150514085556

Hi. That is the YouTube Player template. You can follow those directions if you want to install that.

But take into consideration it is HIGHLY not recommended to add them to your Wiki. It can be a major hindrance and turn-off. So please be 100% sure you want to add that, and if you go through with it, auto-play turned off is preferred.