How to count rows in knitting

There are lots of ways to count rows when your knitting, like using a row counter or marking it on a piece of paper. This video appealed to me because I forget to move the row counter or write it on paper.

http://www.acknitwear.co.uk/blog/2018/5/9/video-keeping-track-of-your-rounds?mc_cid=0a5ee67231&mc_eid=8ef118fe0c