[youtu_be]https://youtu.be/VIDEO_ID[/youtu_be] - URL taken from a YouTube "share" link
[youtube]https://www.youtube.com/watch?v=VIDEO_ID[/youtube] - normal YouTube link
[youtube_video_id]VIDEO_ID[/youtube_video_id] - if you copy/paste the video ID only
Examples:
[youtu_be]https://youtu.be/aUepvTPLDXk[/youtu_be]
[youtube]https://www.youtube.com/watch?v=aUepvTPLDXk[/youtube]
[youtube_video_id]aUepvTPLDXk[/youtube_video_id]
You don't need to type in those tags, there are buttons right above the edit box which you can click to insert them.
If there's anything behind the video ID (aUepvTPLDXk in this case), you need to cut it.
Feel free to add a reply to this thread if you want to try it.
[12:07:22] <Angi> and now pls translate into german so i also understand that fucking jibberish
[12:24:51] <pizzahut> Angi you take a Youtube url and insert it between [youtube] tags - which you don't even have to type in, just click on the button labeled "youtube".
![Razz :P](./images/smilies/icon_razz.gif)