Follow these steps to add a keyboard shortcut to the in5 export within your copy of InDesign.

  1. Edit > Keyboard Shortcuts
  2. From the Product Area menu, choose Scripts
  3. Find Export HTML5 with in5...(or Easy Export Wizard) from the list, and select it
  4. Click on the New Shortcut field and type the keyboard shortcut that you wish to use
  5. Click Assign to apply, and OK to close the dialog

The steps are also shown in details in the video below.