You can cut your fries like normal fast food fries like she shows in the video or slice them up in rounds.  Just don't make them any thicker than she shows or you'll have crunchy, undone potatoes.

Whatever shape you choose, creating a flat surface is always a good idea when you’re cutting rolly-polly veggies.  Keep those Band-Aids stowed away in the drawer.

If you choose not to peel your potatoes, be sure to scrub them well and cut off any green spots and other objectionable bits.