This video is pure crap. Many people who have actually built/run eth rigs including me know there are so many false statements in this video. This guy did zero research into this topic before he put out this video. If you want the actual truth about eth mining rigs there are many other great videos out there. He makes it sound so easy for everyone to do with next to no risk. WARNING do not listen to this video.

BITS BE TRIPPIN is a good resource to look into