Google increased their standard YouTube video player size after I wrote custom code to make it possible to embed those players in forum posts. I just modified my code to increase the sizes of embedded YouTube players to the new standard.

Players in forum posts you haven't viewed before will now display with the larger size. Posts that you have viewed before may have been cached by your web browser causing you to see the old player instead of the new one if you view them again. Most web browsers can be forced to obtain new content from the web server by holding down the keyboard Shift key while clicking the browser reload (or refresh) button.

-Bob

Since making the post above I have upgraded to an improved version of the YouTube player that supports full-screen mode (click the icon in the lower right-hand corner of the player).

-Bob