I know this is an old post, but i thought i'd respond anyway. i'm on joomla 1.0.13, and I just modified allvideos 2.x to display godtube videos. in the plugin_jw_allvideos.php file...
(1) just before "// end parameters", add these 2 lines:
$godtubewidth = $param->get('width', 400);
$godtubeheight = $param->get('height', 323);
(2) anywhere after the "// start 3rd party video providers" (for example, just after "youtube"), add this code:
"godtube" => array("<embed src=\"
godtube.com/flvplayer.swf\" FlashVars=\"viewkey=***code***\" wmode=\"transparent\" quality=\"high\" width=\"".$godtubewidth."\" height=\"".$godtubeheight."\" name=\"godtube\" align=\"middle\" allowScriptAccess=\"sameDomain\" type=\"application/x-shockwave-flash\" pluginspage=\"
www.macromedia.com/go/getflashplayer\" />", "#{godtube}(.*?){/godtube}#s") , (don't forget the comma on the end)