Example
{{Vid|s=(youtube)|1=|2=(325)|3=(inline)|desc=|container=|urlargs=|resize=|valign=}}
Parameters
For more detailed info, check out MediaWiki's page on the EmbedVideo extension
s = The video service to call. - YouTube by default 1 = The raw ID of the video or URL from the player page. 2 = Dimensions in pixels to size the embed container. - 325 by default 3 = Align to the left, centered, or to the right. Inline allows videos to display side by side. - Inline by default desc = Display a description under the embed container. container = Specifies the container type to use for the embed. urlargs = Allows extra URL arguments to be appended to the generated embed URL. (e.g. YouTube start time) autoresize = Automatically resize videos that would otherwise break outside of their container element. valign = Align vertically to the top, middle, bottom, or baseline of the parent element. (Forces element to be inline)