We hunted around for a decent video and found this one by the youtuber "The Breakdown".
The video is short as he edits out all the initial downloading time, the video tells you exactly how to install crazy craft for the windows platform and explains a few other things about changing memory settings which are important if you want a smooth experience.
The link he mentions in the video is provided below for your convenience.
Another great video for installing crazy craft on an apple system by the youtuber "InkedMommy MC".
The video explains some of the finer points for getting the correct java versions installed and memory settings which apply to the windows version as well.
The Voidswrath link mentioned in both videos is provided below for your convenience.