Here is a YouTube channel dedicated to OPALS tutorials..more will be added on a regular basis!
https://www.youtube.com/channel/UCZOfbAtq3UECt9sUl02E1RA

The OPALS help site also has pages with these integrated into the text.

Editing The OPALS Home Page - Part 1
    http://help.opalsinfo.net/getting-started-guide-2/home-main-menu/home-page-portal/

Creating Topic Walls For Your OPALS Home Page
    http://help.opalsinfo.net/getting-started-guide-2/home-main-menu/topic-wall/

The Barcode Range Assignment & Tables
   http://help.opalsinfo.net/7-administration-2/tools/barcode-range-assignment-table/

Using the OPALS Beginner Search
    http://help.opalsinfo.net/getting-started-guide-2/3-opals-search/c-beginners-search/

Delete Items By Hitlist Tool
    http://help.opalsinfo.net/7-administration-2/tools/quick-deletion-utility/

Creating a Patrons CSV file for user import     http://help.opalsinfo.net/getting-started-guide-2/user-administration-guide/import-users/#to-import-users-from-a-text-file