I found this video that made me love latex more than ever! 
. Some videos needs to log in on the webpage but I think this one you can watch it without log in. You need to click on the link because this website it's not supported like youtube and others.
http://www.myvideo.de/watch/8066830/Latex_Layers
. Some videos needs to log in on the webpage but I think this one you can watch it without log in. You need to click on the link because this website it's not supported like youtube and others. http://www.myvideo.de/watch/8066830/Latex_Layers
thanks for sharing culmor