It depends on the game. You would have to check the liscense agreement. Many games allow you to, like The Sims 2.
Download and install the desired mods, record you using them in Survival, upload the video to YouTube. Nothing about modding is illegal.
no its illegal to mod at world at war. you can get banned for modding for the 360 and ps3. modding is legal on the pc version
yes.
There isn't one. The video you saw of it was someone modding the games files to include a nyan-cat texture on the screens!
There is no legal way to do this.
no
It's legal as long as you don't sell them or give them out
Yeah you can.
Online walkthrough for video games are legal. They do not violate video game terms in anyway. Places like GameStop and Wal-Mart sell these guides, too.
Video game piracy is not legal
yes because some games teach kids bad things!
No you cannot. Modding is only for computer games