public static function ClearCache($newSize = 0)
{
//save the max cache limit
$CacheSizeLimit = self::$config["YouTube"]["Cache"]["limit"] - $newSize;
//while the cache size is greater that the max limit we will remove the oldest video
while (self::$sql->query("SELECT SUM(size)/{$CacheSizeLimit} as total FROM YouTubeCache")["rows"][0]["total"] >= 1) {
$oldId = self::$sql->query("SELECT videoID FROM `YouTubeCache` ORDER BY date LIMIT 1")["rows"][0]["videoID"];
$oldVideo = new YouTube($oldId, false, false);
$oldVideo->RemoveFromCache();
}
}