Template:YoutubePlayer/doc

Examples
gives...

Complete Syntax
{	"params": { "id": { "description": "The raw ID of the video or URL from the player page.", "type": "string", "default": "2uUrAE2rw3U", "required": true },		"dimensions": { "description": "Dimensions in pixels to size the embed container. The standard format is width x height where either can be omitted, but the x must proceed height to indicate it as the height.", "example": "640, 640x480, x480", "type": "string", "default": "640x360" },		"alignment": { "description": "Align the placement of the video either to the left, centered, or to the right. Inline will allow multiple videos to display side by side without forced line breaks.", "example": "left, center, right, inline", "type": "string", "default": "inline" },		"description": { "description": "Display a description under the embed container.", "type": "string", "default": "none" },		"container": { "description": "Specifies the container type to use for the embed.", "example": "frame", "type": "string", "default": "none" },		"urlargs": { "description": "Allows extra URL arguments to be appended to the generated embed URL. This is useful for obscure options only supported on one service.", "example": "start=160&end=180&loop=1", "type": "string", "default": "none" },		"autoresize": { "description": "Automatically resize videos when their size will cause them to break outside of their container element.", "example": "true", "type": "string", "default": "none" },		"valignment": { "description": "Align the vertical placement of the video either to the top, middle, bottom, or baseline of the parent element. Using this parameter forces the alignment parameter to be inline.", "example": "top, middle, bottom, baseline", "type": "string", "default": "none" }	},	"description": "To embed YouTube videos in pages. Uses the EmbedVideo extension." }

Note

 * This template is only for YouTube.
 * For list of services other than YouTube, see here.
 * Also, refer to the raw syntax at the extension page when using for other services.