Simple steps 1) Login to your mybb admin panel 2) go to mycode 3) Click on "Add new Mycode" 4) Now write following i) Title: youtube ii) Regular expression: (\[youtube\]|(<a href=\")?(http://)?(www.)?youtube.com/watch\?v=)(.{11}?)((.*?)\" target=\"_blank\">)?((.*?)\[/youtube\]|(.*?)</a>) iii) Replacement: <object width="425" height="350"><param name="movie" … [Read more...]