Youtube videos can be autoplayed when you embed them in a website or a forum. This increases the view count which in turn increases exposure.

Everytime someone opens the page where the video is at the video automatically starts and ups the view count.

<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/OdT9z-JjtJk&autoplay=1"></param><embed src="http://www.youtube.com/v/OdT9z-JjtJk&autoplay=1" type="application/x-shockwave-flash" width="425" height="350"></embed></object>

Just add the &autoplay=1 after the video ID.

To embed the youtube video into a forum post use this code within your post:
http://www.vnnforum.com/misc.php?do=bbcode#youtube

just add the &autoplay=1 immediately after the video ID.

Here's an example:

Go post this on forums and watch your viewcount explode! Stormfront anyone?