Hand drawing effect- The research

Hey guys, so recently I've really been interested in the 'Hand drawing' effect that a few music videos have included lately. For example, disclosures front covers include this;

 

and Justin Bieber's 'what do you mean' video also includes this effect. Me and Connor really want to create this in our final video so I did a little bit of research and watched multiple YouTube videos on how to create this within after-effects, thought I'd link below my favourite tutorial I found and the most helpful video...