Realistically is it as easy as it looks. Or are the videos online just edited to make it look that easy and are there any long term effects on the cpu using glue on the corners ect.
How screwed are you if it gets messed up? If not very and can get another, why not. If you can't, then don't mess with it. Delidding voids warranty and you have to ask yourself if it's operating so badly currently that you'd risk doing this.