We don’t have any videos yet – but I will look to put something together.
In brief though…
Hooks are points in the code of the theme where custom code can be loaded in. You can use the Hooks to add custom HTML and/or shortcodes at the various hook points (i.e places within the page/theme) within Canvas.
Here’s a couple of pics to show you the areas where you can put code (e.g adsense)