this is a scrip restore the ability to show youtube full description if. because youtube try to force us to use the new layout by breaking the old layout. there are two other scripts that do the same thing but this scrip is the most efficient. because other scrips use 2 or 3 variables but this script use only one variable and it is the shortest one
it works but it needs improvement.some times it does not work.you have to refresh the page in order to work.