Hi, I’m brand new to zbrush. I’m looking for downloadable tutorials in mp4 format. I don’t have a lot of time with Internet to watch youtube. All I have is a phone to save to and transfer to my pc at home.
Here is what I do. Get Opera, the browser. Then you can download an extension from the Opera Plugin site that downloads YouTube videos. 
This is great information to have on hand! Thanks for the question and the answer!