we need a joomla 1.5 custom modul that contains a youtube-player to play a list of youtube-links.
** attached image explains in detail **
the youtube-player should start the first link. link 2 and 3 are shown as a preview-image on the right (please see the picture).
clicking the preview-image will play the link in the youtube-player and show the next 2 youtube-links as preview-images on the right.
At the end of the list we start again with link 1.