Many Warcraft maps are like this. They are often called single-player maps or battle maps.
There are many such video downloads in replays.net.
If you only need a standard campaign map, you can download and install "War3 1.2 1 China Idiot Pack" from Europe Tour. This patch can upgrade the game to the latest version, has all the latest official standard battle maps, and can run the game without a CD.
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There is a download in the upper right corner of the website, so I won't connect directly.