why do people hack?

There are actually quite a few videos but the reasons for hacking change from game to game and from community to community. Sometimes they might use hidden cheats (Esp. applies to minecraft) that would then get them famous among PvP communities. In cs:go people may like feeling the power of shredding everybody they see. Some people may dismiss cheaters as just idiots who are bad so they use cheats to win which, while it may be true in some cases, is often not the case.