Some people who have been using the video tutorials have requested this, so I am posting a link here for making your own kernel zip file. Download the linked file, unzip it, and you will have everything you need for making a flash-able kernel zip file, to use in TWRP.
http://www.mediafire.com/file/x3cn41c1ucjs33x/makekernelzip.zip/file
Linux – keep it simple.