These signs are not for smart people. They are for dumb people. If you don't understand them, well...we hate to break it to you, but you might not be one of the smart people.
This guy might benefit from some of the obvious signs featured above. He doesn't seem to have much of a knack for metaphor.
These signs weren't made for stupid people, but it looks like they may have been made by stupid people. Or should we say stupid "people"? You get "it."
If you didn't understand what was funny about those videos, then maybe you need a visit from Captain Obvious.