The creators of South Park worked alongside Blizzard employees to create the episode.
In other words: They had express permission to use the game in the show.
This is copyright infringement if you do not get permission to use the footage. The question of whether or not you would get caught is debatable, but it is illegal to use the footage without permission.
It runs it without any problems.
You can't play dota without installing warcraft 3.
No it does not.
No. You can run it over dialup, but I would rather not play than play WoW over dialup.You can however play Warcraft, Warcraft II and Warcraft III without internet.
You can't watch dota trailer without installing warcraft 3. But, you can watch it in the internet, specifically on youtube.
Vanilla refers to the original World of Warcraft, without any expansions. It does NOT refer to Burning Crusade, Wrath of the Lich King, Cataclysm, or any of the Warcraft RTS games (Warcraft, 2,3).
No. I had Warcraft I, II and III on my laptop but not on my desktop, WoW loaded great without them.
That is a description of copyright infringement.
You can't. World of Warcraft requires a monthly payment. There is no way around this.
The picture itself is protected by copyright; downloading it without permission would be copyright infringement.
This is not possible, the original (classic) World of Warcraft must be installed first as the Burning Crusade is an expansion (addon). You can download the installers from the World of Warcraft website.