Here's a link to the full process: https://www.youtube.com/watch?v=zc1rQDzWsM0&t=194s
If you'd like more info on some of the materials used, follow the links below.
Here's a link to the Illustration Pens I used: http://amzn.to/2zuaf5F
Here's a link to the type of big brush pen I use: http://amzn.to/2eKLPzK
Here's a link to the Bianyo Markers I used: http://amzn.to/2yGaD3w
Here's a link to the Strathmore Mixed Media paper I use: http://amzn.to/2xfEXif
Here's a link to the colored pencils I used: http://amzn.to/2xWJpqE
Here's a link to the eraser I used: http://amzn.to/2gXwMBc